Sleep duration is not significantly correlated with overall academic performance for US adolescents, but sleep quality is.

Associations between Sleep and Academic Performance in US Adolescents: A Systematic Review and Meta-Analysis. Leslie A. Musshafen et al. Sleep Medicine, April 17 2021. https://doi.org/10.1016/j.sleep.2021.04.015

Highlights

• There is a complex relationship between sleep and academic performance.

• There are limited objective measures of sleep utilized in the existing literature.

• Sleep duration is not significantly correlated with overall academic performance.

• Sleep quality is significantly correlated with overall academic performance.

• Aspects of sleep quality such as number of night awakenings demonstrate a negligible, but significant correlation with academic performance outcomes.

Abstract: This systematic review and meta-analysis aim to investigate the relationship between sleep and academic performance in students enrolled in secondary education programs in the United States. The study team conducted a literature search of 4 databases—PubMed, Embase, CINAHL, and ERIC—on September 19 and repeated December 17, 2020. Studies were included if they were observational, published in a peer-reviewed, non-predatory journal, available in full-text, written in English, included adolescents enrolled in an organized academic program, took place in the US, and evaluated the effect of sleep duration and/or sleep quality on academic performance. After excluding reviews, editorials, interventions, and those targeting diagnostic groups, 14 studies met inclusion criteria. Risk of bias was assessed using the NIH Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies; 12 studies were found to be good or high quality, 2 were adequate/fair or poor quality. A meta-analysis of 11 of the included studies revealed that sleep duration (r= 0.03; 95%CI -0.027, 0.087; p= 0.087) and sleep quality (r= 0.089; 95%CI 0.027, 0.151; p= 0.005) had negligible correlations with academic performance (non-significant and significant, respectively). Inconsistencies in definitions, methods, and measures utilized to assess sleep duration, sleep quality, and academic performance constructs may offer insight into seemingly conflicting findings. Given the pivotal role sleep plays in development, future investigations utilizing validated and objective sleep and academic performance measures are needed in adolescents.

Keywords: adolescentstudentsleepacademic performancesystematic reviewmeta-analysis

Citizens in Western democracies often have negative attitudes toward political bodies, yet consistently re-elect their own representatives to these same political bodies

Why People Hate Congress but Love Their Own Congressperson: An Information Processing Explanation. Joris Lammers et al. Personality and Social Psychology Bulletin, April 17, 2021. https://doi.org/10.1177/01461672211002336

Abstract: Citizens in Western democracies often have negative attitudes toward political bodies, yet consistently re-elect their own representatives to these same political bodies. They hate Congress, but love their own congressperson. In contrast to resource-based explanations, we propose that this Paradox of Congressional Support is partly due to the wide availability of negative information about politicians in open societies combined with basic processes of information processing. Five studies found that unrelated negative political information decreases attitudes toward political categories such as U.S. governors but has no effect on attitudes of familiar, individual politicians (e.g., one’s own governor); additional studies further identify familiarity as the critical process. Importantly, we demonstrate that this effect generalizes to all U.S. regions and remains when controlling for and is not moderated by political ideology. These results place a presumed macrolevel political paradox within the domain of cognitive mechanisms of basic information processing.

Keywords: paradox of congressional support, political attitudes, categorization

Men & women: Magnitude of differences, small, fluctuated somewhat as a function of the psychological domain (cognitive variables, social & personality variables, well-being), but was largely constant across age, culture, & generations

Zell, E., Krizan, Z., & Teeter, S. R. (2015). Evaluating gender similarities and differences using metasynthesis. American Psychologist, 70(1), 10–20. Apr 2021. https://doi.org/10.1037/a0038208

Abstract: Despite the common lay assumption that males and females are profoundly different, Hyde (2005) used data from 46 meta-analyses to demonstrate that males and females are highly similar. Nonetheless, the gender similarities hypothesis has remained controversial. Since Hyde’s provocative report, there has been an explosion of meta-analytic interest in psychological gender differences. We utilized this enormous collection of 106 meta-analyses and 386 individual meta-analytic effects to reevaluate the gender similarities hypothesis. Furthermore, we employed a novel data-analytic approach called metasynthesis (Zell & Krizan, 2014) to estimate the average difference between males and females and to explore moderators of gender differences. The average, absolute difference between males and females across domains was relatively small (d = 0.21, SD = 0.14), with the majority of effects being either small (46%) or very small (39%). Magnitude of differences fluctuated somewhat as a function of the psychological domain (e.g., cognitive variables, social and personality variables, well-being), but remained largely constant across age, culture, and generations. These findings provide compelling support for the gender similarities hypothesis, but also underscore conditions under which gender differences are most pronounced.

Relationship between intelligence and creative achievement: Albeit statistically significant, is of small-to-moderate size

Karwowski, Maciej, Marta Czerwonka, Ewa Wiśniewska, and Boris Forthmann. 2021. “How Is Intelligence Test Performance Associated with Creative Achievement? A Meta-analysis.” PsyArXiv. April 17. doi:10.31234/osf.io/fm7hr

Abstract: This paper presents a meta-analysis of the links between intelligence test scores and creative achievement. A three-level meta-analysis of 117 correlation coefficients from 30 studies has found a correlation of r = .16 (95% CI: .12, .19), closely mirroring previous meta-analytic findings. The estimated effects were stronger for overall creative achievement and achievement in scientific domains than for correlations between intelligence scores and creative achievement in the arts and everyday creativity. No signs of publication bias were found. We discuss theoretical implications and provide recommendations for future studies.

Check also Creativity and the Dark Triad: A Meta-Analysis. Izabela Lebud, Bernadetta Figur, Maciej Karwowski. Journal of Research in Personality, March 21 2021, 104088. https://www.bipartisanalliance.com/2021/03/narcissism-machiavellianism-and.html

Early alphabetic writing; Its proliferation in the Southern Levant should be considered a product of Levantine-Egyptian interaction during the mid 2nd millennium BC, rather than of later Egyptian domination

Early alphabetic writing in the ancient Near East: the ‘missing link’ from Tel Lachish. Felix Höflmayer, Haggai Misgav, Lyndelle Webster,  Katharina Streit. Antiquity, April 15 2021. https://www.cambridge.org/core/journals/antiquity/article/early-alphabetic-writing-in-the-ancient-near-east-the-missing-link-from-tel-lachish/C73F769B7CF3A7E4E2607958A096B7D8

Abstract: The origin of alphabetic script lies in second-millennium BC Bronze Age Levantine societies. A chronological gap, however, divides the earliest evidence from the Sinai and Egypt—dated to the nineteenth century BC—and from the thirteenth-century BC corpus in Palestine. Here, the authors report a newly discovered Late Bronze Age alphabetic inscription from Tel Lachish, Israel. Dating to the fifteenth century BC, this inscription is currently the oldest securely dated alphabetic inscription from the Southern Levant, and may therefore be regarded as the ‘missing link’. The proliferation of early alphabetic writing in the Southern Levant should be considered a product of Levantine-Egyptian interaction during the mid second millennium BC, rather than of later Egyptian domination.

Historical context

The newly discovered inscription from Tel Lachish is currently the earliest securely dated example of early alphabetic writing in the Southern Levant. In order to assess the importance of this find, we briefly review the other potential early alphabetic examples from the area.

A disputed contender for the earliest example is a scarab from Tell Abu Zureiq, in the Jezreel Valley. Found in a Middle Bronze Age tomb excavated by Meyerhof (1989), the scarab was dated to the Thirteenth to Fifteenth Dynasties (Giveon 1988: 22; Keel 1997: 17). Its base depicts a man and four signs, which Giveon (1988: 22) originally interpreted as Egyptian hieroglyphs. Kitchen (1989) suggested that these signs could be read as early alphabetic characters, an interpretation rejected by Keel (1997: 16–17), but recently endorsed by Morenz (2011: 164–65).

Another potential early alphabetic inscription is the much-discussed Lachish Dagger, which was discovered in 1934 by the British Expedition in tomb 1502, and dated to the late Middle Bronze Age (Tufnell 1958: 254). The bronze dagger exhibits four potential early alphabetic signs (Tufnell 1958: 128; Sass 1988: 53–54; Hamilton 2006: 390–91), and most scholars accept this interpretation (e.g. Albright 1948, 1969: 10; Naveh 1987: 26; Hamilton 2006: 303–4; Goldwasser 2006: 132, 2016: 140–42; Morenz 2011: 170–71; Lemaire 2017: 106; Haring 2020: 59). In 1988, Sass agreed that the inscription was probably early alphabetic, pointing out that it would be the only one that could be securely dated to the Middle Bronze Age (Sass 1988: 54). He later grew more cautious, however, and suggested that the signs might not be early alphabetic after all (Sass 2004–2005: 150).

A third example that has been dated to the Middle Bronze Age is the so-called ‘Gezer Sherd’. Exhibiting three early alphabetic characters, this sherd was found in 1929 on the surface of Tel Gezer (Albright 1935). It was soon dated to the Middle Bronze Age (Albright 1935)—an attribution accepted by many scholars (e.g. Albright 1969: 10; Naveh 1987: 26; Hamilton 2006: 308–309; Morenz 2011: 166; Goldwasser 2016: 143). Sass was more cautious, however, arguing that the sherd could not be classified typologically, and that its date could range from Middle Bronze Age to the Early Iron Age (Sass 1988: 55). He later concluded that the Gezer Sherd is essentially undatable (Sass 2004–2005: 149).

Several inscriptions on an assemblage of storage jars from Tel Gezer have also been interpreted as early alphabetic writing (Seger 1983, 2013: 186–96; Goldwasser 2016: 142–43). These jars were found in storerooms next to the southern gate area (field IV) and were associated with stratum XVIII (early Late Bronze Age) and stratum XIX (late Middle Bronze Age) (Seger 2013). Most of the jars were inscribed with a single sign, with only two jars bearing two signs each. Sass (1988: 98) mentioned these Gezer jars briefly as examples of early alphabetic writing, but later re-interpreted them as bearing only potters’ marks (Sass 2004–2005: 166, footnote 97).

A fragmentary plaque from Shechem is frequently mentioned in the corpus of potential Middle Bronze Age early alphabetic inscriptions from the Southern Levant (Böhl 1938). According to the earliest publications, this object was found in a Middle Bronze Age building, just above the floor, together with typical, contemporaneous Tell el-Yahudiyah pottery (Böhl 1938: 2). Scholars have long accepted a Middle Bronze or early Late Bronze Age date for the plaque (Albright 1948, 1969: 10–11; Leibovitch 1963; Wimmer 2001; Hamilton 2006: 308), which represents the lower right portion of a stela depicting a person facing to the left and clad in a heavy garment (‘Wulstsaummantel’)—a common Middle Bronze Age garment type (Wimmer 2001). The plaque's archaeological context, however, has been questioned due to the early excavation techniques with limited stratigraphic control, and the lack of a final excavation report (Sass 1988: 57). The early alphabetic nature of the characters has also been called into question (Sass 2004–2005: 149–50).

Yet another disputed early alphabetic inscription was found at Tel Nagila in the 1960s. Here, a body sherd of a jug, with an inscription incised before firing, was discovered in area A, a residential area provisionally dated to the end of the Middle or the early Late Bronze Age (Amiran & Eitan 1965: 121). Sass (1988: 54), however, rightly emphasised the lack of a clear stratigraphic context for that sherd. Later, quoting David Ilan, who observed that a large Late Bronze Age building disturbed the Middle Bronze Age strata in the area where the inscription was found, Sass concluded that the Tel Nagila sherd “is to be regarded as unstratified, and a LBII origin [is] not implausible” (Sass 2004–2005: 159).

The dates and interpretations of the evidence for the earliest occurrences of early alphabetic writing in the Southern Levant are therefore ambiguous, as only the Lachish Dagger (if accepted as early alphabetic) was found in a clear archaeological context datable to the Middle Bronze Age (as rightly pointed out by Sass (1988: 54)). The discovery of the new early alphabetic inscription at Tel Lachish pushes back the earliest securely datable occurrence considerably, and we can now show that early alphabetic writing was employed in the Southern Levant by the mid fifteenth century BC (early Late Bronze Age). This evidence not only closes the gap between the development of early alphabetic inscriptions around Serabit el-Khadim and Wadi el-Hol in Upper Egypt, and its more widespread Southern Levantine use in the later Late Bronze Age, but also suggests that early alphabetic writing was already present in the Southern Levant by the (late) Middle Bronze Age.

The new early alphabetic inscription also underscores the importance of Tel Lachish as an early centre of writing (Goldwasser 2016: 151; Naʾaman 2020). Indeed, Lachish has yielded more examples of Late Bronze Age early alphabetic inscriptions than any other site. In addition to the Lachish Dagger and the new inscription discussed here, the site has yielded four other examples of alphabetic writing. In tomb 527, the British Expedition of 1935 found a bowl (Lachish bowl one) bearing a painted inscription (Tufnell 1958: 129). This tomb also contained a Cypriot Base Ring II juglet and a local imitation of a Mycenaean straight-sided alabastron (Tufnell 1958: 239). Tufnell (1958: 129) considered this tomb to be contemporaneous with the late Fosse temple II or early Fosse temple III, and thus coeval (or slightly earlier) with stratum VII on the mound. In absolute terms, this dates to the fourteenth or thirteenth century BC (Ussishkin 2004b: 57). In Fosse temple III, the British Expedition found the well-known Lachish Ewer, which bears a painted early alphabetic inscription (Tufnell et al. 1940: 47–54; Tuffnell 1958: 130). As Fosse temple III corresponds to stratum VII on the mound, the Ewer roughly dates to the thirteenth century BC (Ussishkin 2004b: 57).

A fragment of a bowl bearing a black-ink inscription comprising two straight lines of characters was found by the Tel Aviv Expedition in pit 3867, in area S (Lemaire 2004). This pit belongs to stratum VI and dates to the twelfth century BC (Ussishkin 2004b: 57). Finally, another inscription from stratum VI—a pottery sherd with several characters incised before firing—was found in the inner part of a Late Bronze Age temple in area BB during recent excavations by the Hebrew University of Jerusalem and Southern Adventist University (Sass et al. 2015). 

Girls exhibit greater empathy than boys following a minor accident

Girls exhibit greater empathy than boys following a minor accident. Joyce F. Benenson, Evelyne Gauthier & Henry Markovits. Scientific Reports volume 11, Article number: 7965. Apr 12 2021. https://www.nature.com/articles/s41598-021-87214-x

Abstract: Hundreds of studies find that girls and women report feeling greater empathy than boys and men in response to adverse events befalling others. Despite this, few non-self-report measures demonstrate similar sex differences. This produces the oft-cited conclusion that to conform to societal expectations of appropriate sex-typed behavior females report higher levels of empathy. Several studies of sex differences in areas of brain activation and on infants’ and young children’s behavior however provide suggestive findings that self-reports reflect actual underlying sex differences in experiencing concern about others. We demonstrate using behavioral indices that females experience more empathy than males after witnessing an adverse event befall a same-sex classmate. In our study, one member of a pair experienced a minor accident on the way to constructing a tower while a bystander observed. We measured whether bystanders ceased their ongoing activity, looked at the victim, waited for the victim to recover from the accident, and actively intervened to help the victim. Female more than male bystanders engaged in these activities. These behavioral results suggest that an adverse event produces different subjective experiences in females than males that motivate objectively different behaviors, consistent with findings from self-report measures of empathy.

Discussion

Following a minor accident, 5- to 7-year-old female bystanders exhibited more empathic behavior than male bystanders. These behavioral findings, along with results from studies of brain activation26,27 and from behavioral studies with infants and young children12,16, support the ubiquitous findings that human females report experiencing greater empathy than males at all ages9. This suggests that even though facial expressions and many physiological assessments rarely yield sex differences in empathic responsivity10,13,18, it is highly likely that females do experience greater feelings of empathy which motivate them to behave in ways that display more concern for victims. Behavioral studies with real life, proximate victims and brain activation measures may be best able to identify sex differences in empathy as others have proposed1,16.

Further, it appeared that the joint condition accentuated the sex difference, though the effect only attained significance in the overall empathy score with 3 measures. The empathy score with the 4 measures was only marginally significant. Nevertheless, it seems reasonable that a condition that increases the proximity and dependence between individuals would augment human females’ investment in one another.

This study builds on behavioral studies of bystanders who witnessed a distressing event that were conducted with newborns, infants, and young children all of which provided evidence that females do experience greater empathy than males10,13,16. This study extends that finding to middle childhood using the measures developed by Caplan and Hay to study concern in older children in a naturalistic setting35. Contrary to most prior studies however, the current study included victims who were always of the same sex and who were familiar because they were classmates. Furthermore, the accident was naturalistic yet standardized, unlike several prior behavioral studies in which the accident was staged. Additionally, no external observers, particularly adults, were present, thereby reducing demand characteristics pressuring females to behave in stereotyped ways or providing authority figures who could be perceived as better able to respond to a victim’s distress. Finally, empathic concern as measured through behavior that is costly to the bystander in terms of lost time and effort provides greater validity than measures such as self-report or facial expressions.

Theoretically, females’ greater concern regarding a stressor is consistent with predictions from parental investment theory that mammalian females exhibit greater responsiveness than males to threats to their offspring2,5. Findings also resemble sex differences found in self-reports about real life contexts in which others with whom participants have close relationships experience serious adverse events7,8,36. Results from the current study suggest that even a classmate who is not a close friend who experiences a minor accident elicits sex differences in empathy.

Our findings suggest when an adverse event occurs, more females than males will be affected. This is consistent with studies showing that more women than men are concerned about hardships that befall family members, individuals in their social networks, and those for whom they are professionally responsible7,8. More females than males also would be expected to offer supportive responses to victims, entailing greater disruptions to their own lives.

Limits of the study include the relatively small number of dyads and the utilization of only a single task. Further, because no sharing of resources occurred in the current study, the expected impact of working on a joint task found in prior studies of reward distributions may have been somewhat attenuated34. Inclusion of more participants from a wider age range, and replication with a new task would enhance the study’s validity. Finally, it is possible that boys experience empathy in a way that has not been measured. In this study, most boys did cease their ongoing activity following the accident, but they engaged in few other empathic activities that we could measure.

In summary, after observing their partner’s accident, female bystanders demonstrated greater empathy than males. In contrast to the relatively consistent conclusion that no sex differences occur in empathy other than in self-reports, results suggest that it is possible to behaviorally observe sex differences in empathy using established measures.

A more accepting attitude toward sugar relationships was found to be associated with more unrestricted sociosexuality, preference to engage in playful love relationships and more self-focused sexual motivation

It Takes Two to Tango: Development, Validation, and Personality Correlates of the Acceptance of Sugar Relationships in Older Men and Women Scale (ASR-OMWS). András Láng et al. Frontiers in Psychology 12. Apr 2021. DOI: 10.3389/fpsyg.2021.592138

Abstract: Sugar relationships can be considered contemporary forms of transactional sex, that is, offering sexual services for material resources or other benefits. Considering the common age differences in these relationships, sugar relationships might be of relevance for older adults as well on the mating market. As a sequel to Birkás et al. (2020) , in the present study, an attitude scale was developed to assess older women’s and men’s acceptance of sugar relationships. We also explored whether the acceptance of sugar relationships was associated with love styles, sociosexual orientation, sexual motivation, and certain socially aversive personality traits. In two online studies with a total number of 836 participants ( N = 277 women and 559 men), the results showed that the Acceptance of Sugar Relationships in Older Men and Women Scale (ASR-OMWS) proved to be a reliable and conceptually valid measure of older individuals’ attitude toward sugar relationships. A more accepting attitude toward sugar relationships was found to be associated with more unrestricted sociosexuality, preference to engage in playful love relationships and more self-focused sexual motivation (study 1; N = 481, 167 women and 314 men), and with more pronounced Dark Triad and borderline traits (study 2; N = 355, 110 women and 245 men). Our findings are discussed in an evolutionary framework.

Discussion

The present study evaluated a self-report measure regarding the acceptance of sugar relationships in older adults. Compared with the mating strategies of young adults, there is much less known about the partner preferences of individuals in older ages. Accordingly, this is the first empirical test of the correlates of attitudes toward sugar relationships in a predominantly evolutionary approach in a sample beyond young adulthood.

Moreover, the ASR-OMWS was used to test the association between personality characteristics, relational attitudes, and attitudes toward sugar relationships in older adults. More accepting individuals can be characterized not only by a more instrumental motivation toward sex but also by respecting the relational aspect of the sugar relationship.

This might suggest that intimacy could also be a product or service that is desired and valued by older individuals (Alterovitz and Mendelsohn, 2011; Fales et al., 2016). Furthermore, older adults scoring high on ASR-OMWS preferred relationships offering fun and taking advantage of partners and were less interested in romantic and emotional love (see section “Results” for love styles). More unrestricted sociosexuality was also positively associated with the acceptance of sugar relationships showing, that despite of their older age and declining mate value, individuals willing to take part in a sugar relationship are sexually more active. These love and sexual motives might play a key role in shaping the mating strategies of older adults. Elevated sexual impulses increase the focus on the physical characteristics of the potential partner and put more value on these signs. Since older adults possess rather material resources than physical appeal, sugar relationships might represent an undertakable and accessible form of affair (e.g., Jonason and Kavanagh, 2010; Allen and Desille, 2017; Træen et al., 2019).

On the personality level, acceptance of sugar relationships was positively associated with socially aversive personality traits (i.e., Dark Triad) and BPO. This suggests that to some extent, partner preferences of older adults are affected by these personality traits. As pointed out earlier, personality affects both advertised and expected partner qualities. Thus, it forms the nature of the desirable relationship. Connecting our results with previous findings regarding the mating strategies of the Dark Triad and BPO, sugar relationship appears to be endorsed by individuals preferring short-term sexual relationships with less commitment and intimacy (e.g., Jonason et al., 2009, 2019; Lavner et al., 2015; Muñoz Centifanti et al., 2016; Birkás et al., 2018).

The question may arise as to why these psychologies are so similar (i.e., openness to offer sexual companionship in exchange for resources or openness to offer resources in exchange for sex). The provision of resources by males to the sexual partner (not specifically in exchange for sex) is an adaptive behavior that plays an important role in the functioning of long-term, emotionally committed relationships, especially in the care of offspring (Buss and Schmitt, 1993, 2019; Conroy Beam and Buss, 2019; Luberti et al., 2020). Therefore, the sensitivity of females to resources in the mating context is also an adaptive trait that may have contributed to their reproductive success in the past. However, direct sexual transaction, free from commitment and mutual reproductive goals, is part of a short-term-focused mating strategy (Anderson and Klofstad, 2012; Whyte et al., 2019; Buss et al., 2020). The psychological characteristics of this strategy, which exploits herself/himself and others, are very similar from both the supply and demand sides: to get as many benefits as possible in the shortest possible time, without considering the possible long-term consequences.

Our study has some limitations as well. Perhaps, the sample is biased due to the possibility that individuals with an increased interest in sex-related topics can be overrepresented in our sample, leading to an increased openness toward sugar relationships. Moreover, the majority of the participants had no direct experience with sugar relationships, and accordingly, their attitudes might be more biased by their personality or impulses. Still, our findings are in line with the prequel to this study (Birkás et al., 2020) showing that older adults who are accepting toward sugar relationships have similar motives and personality traits as young adults who are willing to engage in transactional sex. The most prominent difference between the results obtained from the two studies (i.e., Birkás et al., 2020 and the current study) was that acceptance of sugar relationships was weakly but significantly positively associated with relational motives for having sex in the current study with older sample. Thus, a more direct comparison of age-groups and/or inclusion of behavioral measures might be a fruitful direction of future research.

Predicting Regional Variations in Nationalism with Online Expression of Disgust in China

Predicting Regional Variations in Nationalism with Online Expression of Disgust in China. Shuqing Gao,  Hao Chen,  Kaisheng Lai and  Weining Qian. Front. Psychol., provisionally accepted Apr 2021. DOI 10.3389/fpsyg.2021.564386

Abstract: Disgust is one of the basic emotions and is part of the behavioral immune system, which evolutionarily protects humans from toxic substances as well as from contamination threats by out-group members. Previous works have revealed that disgust not only activates humans’ defense against potential individual and collective threats but also leads to severe moral judgments, negative intergroup attitudes, and even conservative political orientations. As is already known, nationalism is an ideology that features both negative feelings toward out-groups and beliefs about native superiority or privileges. Evidence from previous studies suggests that disgust is related to nationalism’s several components but lacks direct research on nationalism and disgust. The current study examined the relationship between disgust and nationalism in China at both individual and regional levels. In study 1, participants temporally induced disgust (vs. control) increased the adoption of nationalism. In Study 2, we analyzed covariation in disgust expression in the Chinese micro-blog Weibo and nationalism index as part of an online large-scale political survey zuobiao.me at the province level across Mainland China. The results showed that online expression of disgust positively predicted the nationalistic orientation at the regional level. Finally, we discussed how the findings shed light on research concerning online emotion expression and potential future directions.

Are citizens who share fake news ignorant and lazy? Are they fueled by sinister motives, seeking to disrupt the social status quo? Or do they seek to attack partisan opponents in an increasingly polarized political environment?

Osmundsen, Mathias, Alexander Bor, Peter B. Vahlstrup, Anja Bechmann, and Michael Bang Petersen. 2020. “Partisan Polarization Is the Primary Psychological Motivation Behind Political Fake News Sharing on Twitter.” PsyArXiv. March 25. doi:10.31234/osf.io/v45bk

Abstract: The rise of “fake news” is a major concern in contemporary Western democracies. Yet, research on the psychological motivations behind the spread of political fake news on social media is surprisingly limited. Are citizens who share fake news ignorant and lazy? Are they fueled by sinister motives, seeking to disrupt the social status quo? Or do they seek to attack partisan opponents in an increasingly polarized political environment? This manuscript is the first to test these competing hypotheses based on a careful mapping of psychological profiles of over 2,300 American Twitter users linked to behavioral sharing data and sentiment analyses of more than 500,000 news story headlines. The findings contradict the ignorance perspective but provide some support for the disruption perspective and strong support for the partisan polarization perspective. Thus, individuals who report hating their political opponents are the most likely to share political fake news and selectively share content that is useful for derogating these opponents. Overall, our findings show that fake news sharing is fueled by the same psychological motivations that drive other forms of partisan behavior, including sharing partisan news from traditional and credible news sources.

Overestimation? The projected global mean sea-level rise is about 25% lower at the end of this century in the eddying model

Ocean eddies strongly affect global mean sea-level projections. René M. van Westen and Henk A. Dijkstra. Science Advances  Apr 9 2021, Vol. 7, no. 15, eabf1674

DOI: 10.1126/sciadv.abf1674

Abstract: Current sea-level projections are based on climate models in which the effects of ocean eddies are parameterized. Here, we investigate the effect of ocean eddies on global mean sea-level rise (GMSLR) projections, using climate model simulations. Explicitly resolving ocean eddies leads to a more realistic Southern Ocean temperature distribution and volume transport. These quantities control the rate of basal melt, which eventually results in Antarctic mass loss. In a model with resolved ocean eddies, the Southern Ocean temperature changes lead to a smaller Antarctic GMSLR contribution compared to the same model in which eddies are parameterized. As a result, the projected GMSLR is about 25% lower at the end of this century in the eddying model. Relatively small-scale ocean eddies can hence have profound large-scale effects and consequently affect GMSLR projections.

DISCUSSION

For the two different versions of the CESM (HR-CESM and LR-CESM), the overall responses to the increase in CO2 [GMST, contributions by glaciers to the GMSLR (34), thermo(steric) effects (21), and surface mass balance changes of the GrIS (35)] are quite similar and compare also well to 31 CMIP6 models analyzed. The projected temperature change and snowfall anomaly over the AIS for the HR-CESM and LR-CESM are also similar to the ones reported in Gregory and Huybrechts (29).

However, the Antarctic basal melt (7) strongly deviates between the HR-CESM and LR-CESM. The HR-CESM and LR-CESM simulations provide GMSLR projections of 5.4 ± 0.3 cm (95% confidence level) and 15 ± 0.8 cm (95% confidence level) through basal melt in 2100, respectively, which gives a factor 2.8 difference. The LR-CESM GMSLR projection of basal melt is within CMIP6 projections, but the HR-CESM projects quite lower GMSLR values with respect to CMIP6 ones. These differences in basal melt are related to the different horizontal resolutions in the ocean component of the models.

The Southern Ocean is a rather complex region where the large-scale ocean circulation, mesoscale ocean eddies, sea-ice formation, and atmospheric processes all play an important role in the response under global warming. Mesoscale ocean eddies are highly relevant for the redistribution and transport of heat and salt (20, 22, 36, 37) and are critical for the correct momentum balance for the large-scale circulation. Explicitly resolving ocean eddies in the HR-CESM does not only lead to a better representation of the present-day subsurface temperature distribution surrounding Antarctica (compared to LR-CESM) but also to a different response under global warming. For the HR-CESM, we find changes on both the large scale (e.g., in the ACC, sea-ice fields) and the regional scale (Weddell and Ross gyres and the Antarctic Coastal Current), while in the LR-CESM (and CMIP6 models), these occur only on the large scale.

Because of the extreme computational costs, there is unfortunately only one high-resolution simulation available for the analysis done here (HR-CESM control and HR-CESM). More of those simulations are required to provide a broader range of GMSLR projections, also under different climate change scenarios. However, the results here already indicate that sea-level projections based on low-resolution climate models should be interpreted with great care, in particular, regarding estimates of the effects Antarctic basal melt.

Adonization is the positive attitude toward the use of physical appearance to influence others; women perceiving themselves as physically or socially attractive reported higher adonization

The role of self-perceived attractiveness and contingencies of self-worth. Eugenia Mandal, Marcin Moroń. Personality and Individual Differences, Volume 179, September 2021, 110895. https://doi.org/10.1016/j.paid.2021.110895

Highlights

• Adonization is the positive attitude toward the use of physical appearance to influence others.

• Women perceiving themselves as physically attractive reported higher adonization.

• Women perceiving themselves as socially attractive reported higher adonization.

• Women focused on external contingencies of self-worth reported higher adonization.

• External contingencies of self-worth predicted adonization indirectly via low self-perceived attractiveness.

Abstract: In the present study, we examined the associations between self-perceptions of attractiveness, contingencies of self-worth and the attitude toward the use of physical attractiveness as an influence strategy (adonization) among young women. Five hundred and eighty-seven women aged 18–35 years assessed their self-perceptions of attractiveness, contingencies of self-worth, and the attitude toward adonization. Structural equation modeling demonstrated that self-perceptions of physical and social attractiveness predicted a positive attitude toward adonization. External contingencies of self-worth predicted less positive perceptions of attractiveness, while internal contingencies of self-esteem predicted more positive self-perceptions of physical attractiveness. Additionally, external contingencies of self-worth predicted a positive attitude toward adonization. Self-perceptions of physical and social attractiveness mediated between external contingencies of self-esteem and attitude toward adonization.

Keywords: AdonizationPhysical attractivenessSocial attractivenessContingencies of self-worth

Frequent, light-moderate alcohol consumption was associated with maintenance of normal weight; although heavy drinking was linked to obesity, effect sizes were modest

How alcohol consumption influences obesity in middle-aged men: A systematic review. Laura Sayers. The Journal of Health Design, Apr 2021. https://www.journalofhealthdesign.com/JHD/article/view/130

Abstract: This systematic review analyzes how alcohol consumption impacts the weight of middle-aged men. Frequent, light-moderate alcohol consumption was associated with maintenance of normal weight. Although heavy drinking was linked to obesity, effect sizes were modest. Spirits, not beer or wine, were associated with weight gain.

How are people making fortunes today? Roughly 3/4 by starting companies and 1/4 by investing

How People Get Rich Now. Paul Graham, April 2021. paulgraham.com/richnow.html

Every year since 1982, Forbes magazine has published a list of the richest Americans. If we compare the 100 richest people in 1982 to the 100 richest in 2020, we notice some big differences.

In 1982 the most common source of wealth was inheritance. Of the 100 richest people, 60 inherited from an ancestor. There were 10 du Pont heirs alone. By 2020 the number of heirs had been cut in half, accounting for only 27 of the biggest 100 fortunes.

Why would the percentage of heirs decrease? Not because inheritance taxes increased. In fact, they decreased significantly during this period. The reason the percentage of heirs has decreased is not that fewer people are inheriting great fortunes, but that more people are making them.

How are people making these new fortunes? Roughly 3/4 by starting companies and 1/4 by investing. Of the 73 new fortunes in 2020, 56 derive from founders' or early employees' equity (52 founders, 2 early employees, and 2 wives of founders), and 17 from managing investment funds.

There were no fund managers among the 100 richest Americans in 1982. Hedge funds and private equity firms existed in 1982, but none of their founders were rich enough yet to make it into the top 100. Two things changed: fund managers discovered new ways to generate high returns, and more investors were willing to trust them with their money. [1]

But the main source of new fortunes now is starting companies, and when you look at the data, you see big changes there too. People get richer from starting companies now than they did in 1982, because the companies do different things.

In 1982, there were two dominant sources of new wealth: oil and real estate. Of the 40 new fortunes in 1982, at least 24 were due primarily to oil or real estate. Now only a small number are: of the 73 new fortunes in 2020, 4 were due to real estate and only 2 to oil.

By 2020 the biggest source of new wealth was what are sometimes called "tech" companies. Of the 73 new fortunes, about 30 derive from such companies. These are particularly common among the richest of the rich: 8 of the top 10 fortunes in 2020 were new fortunes of this type.

Arguably it's slightly misleading to treat tech as a category. Isn't Amazon really a retailer, and Tesla a car maker? Yes and no. Maybe in 50 years, when what we call tech is taken for granted, it won't seem right to put these two businesses in the same category. But at the moment at least, there is definitely something they share in common that distinguishes them. What retailer starts AWS? What car maker is run by someone who also has a rocket company?

The tech companies behind the top 100 fortunes also form a well-differentiated group in the sense that they're all companies that venture capitalists would readily invest in, and the others mostly not. And there's a reason why: these are mostly companies that win by having better technology, rather than just a CEO who's really driven and good at making deals.

To that extent, the rise of the tech companies represents a qualitative change. The oil and real estate magnates of the 1982 Forbes 400 didn't win by making better technology. They won by being really driven and good at making deals. [2] And indeed, that way of getting rich is so old that it predates the Industrial Revolution. The courtiers who got rich in the (nominal) service of European royal houses in the 16th and 17th centuries were also, as a rule, really driven and good at making deals.

People who don't look any deeper than the Gini coefficient look back on the world of 1982 as the good old days, because those who got rich then didn't get as rich. But if you dig into how they got rich, the old days don't look so good. In 1982, 84% of the richest 100 people got rich by inheritance, extracting natural resources, or doing real estate deals. Is that really better than a world in which the richest people get rich by starting tech companies?

Why are people starting so many more new companies than they used to, and why are they getting so rich from it? The answer to the first question, curiously enough, is that it's misphrased. We shouldn't be asking why people are starting companies, but why they're starting companies again. [3]

In 1892, the New York Herald Tribune compiled a list of all the millionaires in America. They found 4047 of them. How many had inherited their wealth then? Only about 20% — less than the proportion of heirs today. And when you investigate the sources of the new fortunes, 1892 looks even more like today. Hugh Rockoff found that "many of the richest ... gained their initial edge from the new technology of mass production." [4]

So it's not 2020 that's the anomaly here, but 1982. The real question is why so few people had gotten rich from starting companies in 1982. And the answer is that even as the Herald Tribune's list was being compiled, a wave of consolidation was sweeping through the American economy. In the late 19th and early 20th centuries, financiers like J. P. Morgan combined thousands of smaller companies into a few hundred giant ones with commanding economies of scale. By the end of World War II, as Michael Lind writes, "the major sectors of the economy were either organized as government-backed cartels or dominated by a few oligopolistic corporations." [5]

In 1960, most of the people who start startups today would have gone to work for one of them. You could get rich from starting your own company in 1890 and in 2020, but in 1960 it was not really a viable option. You couldn't break through the oligopolies to get at the markets. So the prestigious route in 1960 was not to start your own company, but to work your way up the corporate ladder at an existing one. [6]

Making everyone a corporate employee decreased economic inequality (and every other kind of variation), but if your model of normal is the mid 20th century, you have a very misleading model in that respect. J. P. Morgan's economy turned out to be just a phase, and starting in the 1970s, it began to break up.

Why did it break up? Partly senescence. The big companies that seemed models of scale and efficiency in 1930 had by 1970 become slack and bloated. By 1970 the rigid structure of the economy was full of cosy nests that various groups had built to insulate themselves from market forces. During the Carter administration the federal government realized something was amiss and began, in a process they called "deregulation," to roll back the policies that propped up the oligopolies.

But it wasn't just decay from within that broke up J. P. Morgan's economy. There was also pressure from without, in the form of new technology, and particularly microelectronics. The best way to envision what happened is to imagine a pond with a crust of ice on top. Initially the only way from the bottom to the surface is around the edges. But as the ice crust weakens, you start to be able to punch right through the middle.

The edges of the pond were pure tech: companies that actually described themselves as being in the electronics or software business. When you used the word "startup" in 1990, that was what you meant. But now startups are punching right through the middle of the ice crust and displacing incumbents like retailers and TV networks and car companies. [7]

But though the breakup of J. P. Morgan's economy created a new world in the technological sense, it was a reversion to the norm in the social sense. If you only look back as far as the mid 20th century, it seems like people getting rich by starting their own companies is a recent phenomenon. But if you look back further, you realize it's actually the default. So what we should expect in the future is more of the same. Indeed, we should expect both the number and wealth of founders to grow, because every decade it gets easier to start a startup.

Part of the reason it's getting easier to start a startup is social. Society is (re)assimilating the concept. If you start one now, your parents won't freak out the way they would have a generation ago, and knowledge about how to do it is much more widespread. But the main reason it's easier to start a startup now is that it's cheaper. Technology has driven down the cost of both building products and acquiring customers.

The decreasing cost of starting a startup has in turn changed the balance of power between founders and investors. Back when starting a startup meant building a factory, you needed investors' permission to do it at all. But now investors need founders more than founders need investors, and that, combined with the increasing amount of venture capital available, has driven up valuations. [8]

So the decreasing cost of starting a startup increases the number of rich people in two ways: it means that more people start them, and that those who do can raise money on better terms.

But there's also a third factor at work: the companies themselves are more valuable, because newly founded companies grow faster than they used to. Technology hasn't just made it cheaper to build and distribute things, but faster too.

This trend has been running for a long time. IBM, founded in 1896, took 45 years to reach a billion 2020 dollars in revenue. Hewlett-Packard, founded in 1939, took 25 years. Microsoft, founded in 1975, took 13 years. Now the norm for fast-growing companies is 7 or 8 years. [9]

Fast growth has a double effect on the value of founders' stock. The value of a company is a function of its revenue and its growth rate. So if a company grows faster, you not only get to a billion dollars in revenue sooner, but the company is more valuable when it reaches that point than it would be if it were growing slower.

That's why founders sometimes get so rich so young now. The low initial cost of starting a startup means founders can start young, and the fast growth of companies today means that if they succeed they could be surprisingly rich just a few years later.

It's easier now to start and grow a company than it has ever been. That means more people start them, that those who do get better terms from investors, and that the resulting companies become more valuable. Once you understand how these mechanisms work, and that startups were suppressed for most of the 20th century, you don't have to resort to some vague right turn the country took under Reagan to explain why America's Gini coefficient is increasing. Of course the Gini coefficient is increasing. With more people starting more valuable companies, how could it not be?