Domestic cats (Felis catus) prefer freely available food over food that requires the slightest effort

Domestic cats (Felis catus) prefer freely available food over food that requires effort. Mikel M. Delgado, Brandon Sang Gyuc Han & Melissa J. Bain. Animal Cognition, Jul 26 2021. https://rd.springer.com/article/10.1007/s10071-021-01530-3

Abstract: Contrafreeloading is the willingness of animals to work for food when equivalent food is freely available. This behavior is observed in laboratory, domesticated, and captive animals. However, previous research found that six laboratory cats failed to contrafreeload. We hypothesized that cats would contrafreeload in the home environment when given a choice between a food puzzle and a tray of similar size and shape. We also hypothesized that more active cats would be more likely to contrafreeload. We assessed the behavior of 17 neutered, indoor domestic cats (Felis catus) when presented with both a food puzzle and a tray across ten 30-min trials. Each cat wore an activity tracker, and all sessions were video recorded. Cats ate more food from the free feed tray than the puzzle (t (16) = 6.77, p < 0.001). Cats made more first choices to approach and eat from the tray. There was no relationship between activity and contrafreeloading, and there was no effect of sex, age, or previous food puzzle experience on contrafreeloading. Our results suggest that cats do not show strong tendencies to contrafreeload in the home environment, although some cats (N = 4) ate most food offered in the puzzle or showed weak contrafreeloading tendencies (N = 5). Eight cats did not contrafreeload. Cats who consumed more food from the puzzle, consumed more food in general, suggesting a relationship between hunger and effort. Further research is required to understand why domestic cats, unlike other tested species, do not show a strong preference to work for food.

Discussion

In this study, we tested for the first time whether domestic cats living in homes would contrafreeload, as has been demonstrated in several captive and domesticated species. We did not find strong evidence for contrafreeloading; instead, cats preferred to eat the food that was freely available with no required additional effort. This was true when looking at both the overall population of cats, and the behavior of individual cats across trials.

We were unable to identify specific individual traits (sex, age and previous experience with a food puzzle) that predicted whether cats would contrafreeload. The four cats who appeared to be contrafreeloaders had one trait in common; they ate most of the food available to them during trials. In fact, the strongest predictor of amount of food eaten from the puzzle was the amount of food eaten from the tray.

The unanswered question is why cats, among multiple species tested, appear to be the only one that does not reliably contrafreeload. This tendency appears to contradict the fact that cats naturally work for food by hunting and will stop eating to hunt additional prey (Adamec 1976; Leyhausen 1979). Some differences in contrafreeloading tendencies among species have been attributed to domestication, such as in one study where white leghorn layers contrafreeloaded less than their ancestral species, jungle fowl (Jensen et al. 2002). Possible explanations included selection for allocation of resources toward reproduction and individual growth, and less need for information gathering when food sources are stable.

The cats in our study were all spayed or neutered and housed indoors only, which might have impacted their behavior. Spaying and neutering decreases the metabolic rate (Fettman et al. 1997) and the physical activity of female cats (Belsito et al. 2009), while simultaneously increasing cats’ food intake (Alexander et al. 2011; Wei et al. 2014). However, the previous study that failed to find evidence of contrafreeloading in cats only included reproductively intact cats (Koffer and Coulson 1971). To date, no studies have directly compared the activity patterns of indoor cats with those who have outdoor access. Thus, it would be premature to predict different results from reproductively intact or outdoor cats.

We also found no relationship between activity and contrafreeloading behavior. This result supports a previous study that found no change in activity level after introducing food puzzles to cats (Naik et al. 2018). Another study found that when two laboratory cats were required to offer an increasing number of touches to a switchplate in exchange for free access to food, they decreased the number of meals per day, and consumed more food at each feeding period (Collier et al. 1997). Studies of free-roaming feral cats suggest they spend almost 90% of their time inactive, with < 1% of their time spent hunting (Hernandez et al. 2018). In general, cats appear to conserve energy to the greatest extent possible, minimizing the amount of time and effort required to meet their caloric requirements, whether by hunting or engaging with enrichment devices in homes.

Our conclusion that cats prefer freely available food over that which requires effort is limited by some aspects of our study, such as a relatively small sample size. It is possible that the appearance of the food puzzle hindered consumption, as food was more visible in the tray. However, the cover of the puzzle was translucent, and several of the compartments face upward, such that the food would be visible from above. Although the novelty or shape of the food puzzle could have been a deterrent to the cats, we controlled for this by presenting all cats with a novel tray of the same shape and size simultaneously. All cats ate from both the puzzle and the tray during the training period, so we do not believe that appearance, novelty, or aversion to the device itself can explain the failure to contrafreeload.

We also did not control for food intake or hunger, as we did not want to increase the stress levels of cats, who can be sensitive to changes in feeding regimens (Stella et al. 2011). Food restriction can also reduce contrafreeloading (Inglis et al. 1997), so we did not want food withheld from cats longer than they were accustomed to. Since the cats ate a large percentage of the freely available food during trials, we cannot blame the failure to contrafreeload on a lack of interest in food. However, as we only gave cats access to the tray and puzzle for 30 min per trial, it is possible that cats would have engaged more with the puzzle if it continued to be available throughout the day.

Interpretation of our results may be dependent on how contrafreeloading is defined. Sometimes contrafreeloading is defined as when an animal will work for any food in the presence of freely available food, whereas some consider it a preference to work for food (Inglis et al., Osborne et al.). Most cats in our study did eat some food from the puzzle but none ate more food from the puzzle than the tray. Thus, although we have evidence for some willingness to work for food when freely available food is present (weak contrafreeloading), there is no evidence that cats preferred to work for food.

Of the species who have been tested for contrafreeloading, few predatory species (chimps, humans, and cats) are included, and most species tested are foragers who use extended search to acquire food (e.g., pigeons, rats, gerbils, Inglis et al. 1997). Sit-and-wait predation is considered low cost and is a common hunting style among felids (Williams et al. 2014). A full discussion of predatory energetics is beyond the scope of this manuscript, but contrafreeloading, which provides information about the quality of food patches, is expected to be weaker in species that do not engage in prolonged search (Inglis et al. 1997). Future studies should investigate whether foraging style is an important factor in contrafreeloading tendencies, and whether energy conservation is influential.

Like other studies, we did not find a statistically significant effect of sex on contrafreeloading (Lindqvist and Jensen 2008; Vasconcellos et al. 2012). However, in the current study, the four cats who did show a tendency to contrafreeload were all males, and the two cats who did not eat any food from the puzzle were both females. Male cats are more prone to obesity (Lund et al. 2005) and may be more food motivated in general. Our findings suggest the sex of the cat should be considered in future studies.

Future research can further explore contrafreeloading in cats by introducing different types of food puzzles or operant behaviors necessary for obtaining food. Changing the value of the food offered may also increase contrafreeloading, as novelty of food items increases the level of reinforcement (Inglis et al. 1997). The effects of foraging enrichment on cat welfare and health indicators should also be assessed. A presentation of case studies found positive effects of food puzzles for domestic cats, such as weight reduction and an improvement of behavioral health (Dantas et al. 2016), but puzzles do not appear to increase overall activity levels (Naik et al. 2018).

Understanding contrafreeloading is important for captive and domestic animal welfare as foraging enrichment is a frequently used tool to provide choice and mental stimulation. The effects of such enrichment on the behavior of captive animals are rarely tested. For domestic cats, the provision of foraging enrichment may depend on the needs and food motivation of the individual animal, and may be best introduced as a choice to enhance welfare, as foraging enrichment has been suggested to do in other species (e.g., Tarou and Bashaw 2007).

Changes in Atlantic major hurricane frequency since the late-19th century

Changes in Atlantic major hurricane frequency since the late-19th century. Gabriel A. Vecchi, Christopher Landsea, Wei Zhang, Gabriele Villarini & Thomas Knutson. Nature Communications volume 12, Article number: 4054. Jul 19 2021. https://www.nature.com/articles/s41467-021-24268-5

Abstract: Atlantic hurricanes are a major hazard to life and property, and a topic of intense scientific interest. Historical changes in observing practices limit the utility of century-scale records of Atlantic major hurricane frequency. To evaluate past changes in frequency, we have here developed a homogenization method for Atlantic hurricane and major hurricane frequency over 1851–2019. We find that recorded century-scale increases in Atlantic hurricane and major hurricane frequency, and associated decrease in USA hurricanes strike fraction, are consistent with changes in observing practices and not likely a true climate trend. After homogenization, increases in basin-wide hurricane and major hurricane activity since the 1970s are not part of a century-scale increase, but a recovery from a deep minimum in the 1960s–1980s. We suggest internal (e.g., Atlantic multidecadal) climate variability and aerosol-induced mid-to-late-20th century major hurricane frequency reductions have probably masked century-scale greenhouse-gas warming contributions to North Atlantic major hurricane frequency.

Discussion

One of the most consistent expectations from projected future global warming is that there should be an increase in TC intensity, such that the fraction of MH to HU increases6,20,21,22,25,26,27,28,29,30,31. This issue has become more pressing with the recent finding of a global increase in this metric since 1979 using homogenized satellite-based data14—a finding to which Atlantic HU contribute. We here build on the methods of refs. 9,10 to build a homogenized record of Atlantic MH frequency and MH/HU ratio since the 19th century. We find here that, once we include a correction for undercounts in the pre-satellite era basin-wide NA HU and MH frequency, there are no significant increases in either basin-wide HU or MH frequency, or in the MH/HU ratio for the Atlantic basin between 1878 and 2019 (when the U.S. Signal Corps started tracking NA HUs35). We suggest that the modestly significant 1851–2019 increase in basin-wide MH frequency and MH/HU ratio that remains after including the HU and MH adjustment reflects data inhomogeneity that our adjustment is unable to correct—rather than an actual increase in these quantities. The homogenized basin-wide HU and MH record does not show strong evidence of a century-scale increase in either MH frequency or MH/HU ratio associated with the century-scale, greenhouse-gas-induced warming of the planet. For example, the temporal evolution of the global mean temperature is not closely reflected in the temporal evolution of adjusted MH/HU ratio shown in Fig. 4.

Does this work provide evidence against the hypothesis that greenhouse-gas-induced warming may lead to an intensification of North Atlantic HUs? Not necessarily. Substantial multi-decadal variability may obscure trends computed over the past century16,17,18,20,21, and recent studies suggest the possibility for an aerosol-driven reduction in NA HU and MH activity over the 1960s–1980s (refs. 19,20,21,22,23,24), which may have obscured any greenhouse induced NA HU and MH intensification over the 20th century. For example, a statistical downscaling of global climate models (GCMs) that were part of the Coupled Model Intercomparison Project Phase 5 (CMIP5) shows a robust and significant projection for a greenhouse gas-induced 21st century NA hurricane intensification; yet applying that same method to historical simulations the greenhouse-induced intensification over the late-19th and 20th century is masked by the late-20th century aerosol-induced weakening20. Historical simulations show that aerosol forcing may have masked the 19th-20th century greenhouse-gas-induced increase in potential intensity, the theoretical upper bound on tropical cyclone intensity, even though climate models show increases in potential intensity in tropical cyclone regions in response to projected future warming24,25,26. The homogenized MH and HU data developed in the present study serve as a target for century-scale historical simulations with high-resolution dynamical and statistical models that are used for 21st century projections.

The adjusted NA basin-wide MH frequency and MH/HU ratio show substantial multi-decadal variability (Figs. 2, 4), and the adjusted basin-wide MH frequency shows its lowest values over the 1960s–1980s (Fig. 2). These features show at least qualitative consistency with the notion of a strong influence of either internal multi-decadal climate variability and/or late-20th century aerosol-induced weakening of NA HU intensity during that period. Our homogenized records also correspond with document- and proxy-based reconstructions of Antilles and Atlantic HUs, which indicate that substantial variability in HU frequency has been present in the Atlantic, and the inactive period in the late 20th century may have been the most inactive period in recent centuries42,43.

The homogenized hurricane records suggest a consistent and marginally statistically significant decrease in the ratio of basin-wide hurricanes striking the USA as hurricanes (Table 2, row 3). Some models project an eastward shift in the location of NA TCs in response to increasing greenhouse gases (e.g., refs. 27,28), so this observed change may reflect the emerging impact of greenhouse warming on NA TC tracks. However, although there is a nominal decrease in the ratio of basin-wide MH striking the USA as MH (Table 2, row 4), the trends are not significant for any of the time periods explored.

Caution should be taken in connecting recent changes in Atlantic hurricane activity to the century-scale warming of our planet. The adjusted records presented here provide a century-scale context with which to interpret recent studies indicating a significant recent increase in NA MH/HU ratio over 1980–2017 (ref. 14), or in the fraction of NA tropical storms that rapidly intensified over 1982–2009 (ref. 15). Our results indicate that the recent increase in NA basin-wide MH/HU ratio or MH frequency is not part of a century-scale increase. Rather it is a rebound from a deep local minimum in the 1960s–1980s. We hypothesize that these recent increases contain a substantial, even dominant, contribution from internal climate variability16,17,18,20,21, and/or late-20th century aerosol increases and subsequent decreases19,20,21,22,23,24, in addition to any contributions from recent greenhouse gas-induced warming20,22,24,44. It has been hypothesized, for example, that aerosol-induced reductions in surface insolation over the tropical Atlantic since between the mid-20th century and the 1980s may have resulted in an inhibition of tropical cyclone activity19,20,21,22,23,24; the relative contributions of anthropogenic sulfate aerosols, dust, and volcanic aerosols to this signal (each of which would carry distinct implications for future hurricane evolution)—along with the magnitude and impact of aerosol-mediated cloud changes—remain a vigorous topic of scientific inquiry. It has also been suggested that multi-decadal climate variations connected to changes in meridional ocean overturning may have resulted in a minimum in northward heat transport in the Atlantic and a resulting reduction in Atlantic hurricane activity16,17,18,20,21. Given the uncertainties that presently exist in understanding multi-decadal climate variability, the climate response to aerosols and impact of greenhouse gas warming on NA TC activity, care must be exercised in not over-interpreting the implications of, and causes behind, these recent NA MH increases. Disentangling the relative impact of multiple climate drivers on NA MH activity is crucial to building a more confident assessment of the likely course of future HU activity in a world where the effects of greenhouse gas changes are expected to become increasingly important.

Children shared more treats when there was gossiping, regardless of whether the gossip receiver could identify them; this suggests that 4- and 8-year-old children attempt to manage their reputation when they could be a target of gossip

Children manage their reputation by caring about gossip. Asami Shinohara, Yasuhiro Kanakogi, Yuko Okumura, Tessei Kobayashi. Social Development, July 20 2021. https://doi.org/10.1111/sode.12548

Abstract: Individuals engage in reputation management by adjusting their behaviour in front of others. As gossip plays an important role in human society, individuals need to concern themselves with not only a present observer's evaluations but also non-present people's impressions. In this study, we investigated whether 4- and 8-year-old children (N = 144) would adjust their sharing behaviours when presented with the possibility of an observer's gossiping. We manipulated whether the receiver of gossip could identify the child being gossiped about by using real-life group boundaries. The children shared their treats with an anonymous peer in front of an observer under three conditions. In the same-group gossip condition, the observer told the children that she would report their behaviour to their friends. In the different-group gossip condition, the children's behaviours were to be reported to an unknown peer (from a different kindergarten or elementary school). In the no-gossip condition, the observer would not gossip. Children from both age groups shared more treats in the two gossip conditions than in the no-gossip circumstance, regardless of whether the gossip receiver could identify them. These findings suggest that 4- and 8-year-old children attempt to manage their reputation when they could be a target of gossip.

White sclerae in primates are associated with increased cooperative behaviors (determining a conspecifics likely intentions from their gaze direction), & dark sclerae are associated with increased intra-specific lethal aggression

The evolutionary origins of primate scleral coloration. Alex S. Mearing, Judith M. Burkart, Jacob Dunn, Sally E. Street, Kathelijne Koops. bioRxiv Jul 25 2021. https://doi.org/10.1101/2021.07.25.453695

Abstract: Primate gaze following behaviors are of great interest to evolutionary scientists studying social cognition. The ability of an organism to determine a conspecifics likely intentions from their gaze direction may confer an advantage to individuals in a social group. This advantage could be cooperative and/or competitive. Humans are unusual in possessing depigmented sclerae whereas most other extant primates, including the closely related chimpanzee, possess dark scleral pigment. The origins of divergent scleral morphologies are currently unclear, though human white sclerae are often assumed to underlie our hyper-cooperative behaviors. Here, we use phylogenetic generalized least squares (PGLS) analyses with previously generated species-level scores of proactive prosociality, social tolerance (both n=15 primate species), and conspecific lethal aggression (n=108 primate species) to provide the first quantitative, comparative test of three complementary hypotheses. The cooperative eye and self-domestication explanations predict white sclerae to be associated with cooperative, rather than competitive, environments. The gaze camouflage hypothesis predicts that dark scleral pigment functions as gaze direction camouflage in competitive social environments. We show that white sclerae in primates are associated with increased cooperative behaviors whereas dark sclerae are associated with reduced cooperative behaviors and increased intra-specific lethal aggression. Our results lend support to all three hypotheses of scleral evolution, suggesting that primate scleral morphologies evolve in relation to variation in social environment.

From 2009... Good-death Beliefs and Cognition in Himalayan Hinduist Pilgrimage

Good-death Beliefs and Cognition in Himalayan Pilgrimage. Andreas Nordin. Method and Theory in the Study of Religion 21 (2009) 402-436. https://www.academia.edu/21820655

Abstract: This article discusses the notions of a good death associated with Hindu pilgrimages in the Nepalese and Tibetan Himalayas. Using theories and concepts from the cognitive anthropology of religion and from the cognitive science of religion—particularly the cultural epidemiological method—my objective is to explain why certain systems of thought and behaviour are favoured over others in cultural transmission. My thesis is that the apprehension of contagion and/or contamination, combined with prevailing cultural representations, exerts selective pressure on the formation of beliefs about good death. Pilgrimage sites are associated with intuitions about contagious and contaminating contact, avert the pollution of death, and provide links to supernatural agents.

Keywords: Hindu pilgrimage, cognition, death, good-death beliefs

We can't handle the truth... From the paper, pp 427-8:

In a summary of pilgrimage sites in the Hindu textual tradition Saraswati refers to such scriptures as the Dharmashastra, in which suicide at pilgrimage sites such as Prayag, Gangasagr och Kashi was morally sanctioned under certain condition (1983: 24). Saraswati’s presentation of the dharmashastra prescribes various forms of sanctioned and meritorious pilgrim suicides for soteriological purposes:

Following are the meritorious modes of suicides: (1) starving; (2) covering oneself with dry cowdung cakes and setting it on fire and consuming oneself therein; (3) burying oneself in snow; (4) to plunge into the water at the sangam, enumerate one’s sins and pray till alligators come and devour the man; (5) hanging with the head down in the stream and feet up and drinking the waters of Ganga; (6) cut one’s own throat, or cutting off one’s flesh and giving it as food to birds; (7) by falling head-long from a cliff, at Amarkantaka, for instance (1983: 24).

Clearly, several sources confi rm that religious suicide at pilgrimage sites has been sanctioned.

This, however, was denied by most of the pilgrims interviewed in this study. Theological norms that sanctioned ritual suicide were rejected by most of the pilgrims who were travelling to Muktinath, Pasupatunath and Mt. Kailash and Manasarovar. The pilgrims’ aversion to suicide in a context that was otherwise declared to be positive may exemplify a “theological correctness-effect” (Barrett 1999) or, more aptly, the tendency towards theological incorrectness (Slone 2004). That is, this aversion may be strengthened by fast, “online-reasoning” (Barrett 1999) associated with social exchange intuitions, rather than a slow matching of theological reflection with religious sources.

Quotations from the dharmashastra were shown to some pilgrims as an example of a scripture that did sanction suicide at pilgrimage sites. But the pilgrims generally had a strong antipathy for suicide and rarely hesitated to condemn it. Some of the pilgrims who saw the excerpts from the dharmashastra claimed they were false even though they were specially trained in the theology of their tradition.

Across cultures, males dominate reputation in most areas, like Cultural group unity, Dominance, Social and material success, & Supernatural healing; women excel in Sexuality (less infidelity)

Garfield, Zachary H., Ryan Schacht, Emily R. Post, Dominique Ingram, Andrea Uehling, and Shane Macfarlan. 2021. “The Content and Structure of Reputation Domains Across Human Societies: A View from the Evolutionary Social Sciences.” OSF Preprints. July 2. doi:10.31219/osf.io/mk4wq

Abstract: Reputations are an essential feature of human sociality, critical for the evolution of cooperation and group living. Much scholarship has focused on reputations, yet typically on a narrow range of domains (e.g., prosociality, aggressiveness), usually in isolation. Humans can develop reputations, however, from any collective information. We conducted exploratory analyses on the content, distribution, and structure of reputation domain diversity across cultures, using the Human Relations Area Files ethnographic database. After coding ethnographic texts on reputations from 153 cultures, we used hierarchical modelling, cluster analysis, and text analysis to provide an empirical view of reputation domains across societies. Findings suggest: 1) reputational domains vary cross-culturally, yet reputations for cultural conformity, prosociality, social status, and neural capital are widespread; 2) reputation domains are more variable for males than females; and 3) particular reputation domains are strongly interrelated, demonstrating a structure consistent with dimensions of human uniqueness. We label these reputational features: Cultural group unity, Dominance, Sexuality, Social and material success, and Supernatural healing. Ultimately, through this work, we highlight the need for future research on the evolution of cooperation and human sociality to consider a wider range of reputation domains, as well as their patterning by social, ecological, and gender-specific pressures.

Greece: Gay people were not less likely than people of other sexual orientations to be in a relationship; gay men but not women experienced longer spells of singlehood than people of other sexual orientations

The effect of sexual orientation on singlehood: Evidence from the Greek cultural context. Menelaos Apostolou. Personality and Individual Differences, Volume 183, December 2021, 111150. https://doi.org/10.1016/j.paid.2021.111150

Highlights

• Finds that, homosexual people were not less likely than people of other sexual orientations to be in a relationship.

• Finds that, homosexual people were considerably less likely to be married than people of other sexual orientations.

• Finds that, homosexual men but not women experienced longer spells of singlehood than people of other sexual orientations.

Abstract: The social stigma attached to same-sex attraction, along with the limited availability of same-sex outlets, are likely to cause difficulties to homosexual people in attracting intimate partners. Based on this reasoning, the current study aimed to test the hypothesis that homosexual people would be more likely to be involuntarily single, and would experience longer spells of singlehood than people of other sexual orientations. Evidence from a sample of 10,939 Greek-speaking participants, indicated that homosexual people were not less likely than people of other sexual orientations to be in a relationship than involuntarily single. However, homosexual people were considerably less likely to be married than people of other sexual orientations, with the effect being more pronounce for men than for women. In addition, male homosexuals experienced longer spells of singlehood than men of other sexual orientations, but no such effect was found for women.

Keywords: SinglehoodInvoluntary singlehoodSexual orientationHomosexuality

COVID-19: Across 17 countries with lower fluctuations in births, the number of births fell on average by more than 5% in Nov & Dec 2020 & 8.9% in Jan 21, YoY; Spain births plummeted by 20% in Dec 20 and Jan 21

Sobotka, Tomas, Aiva Jasilioniene, Ainhoa A. Galarza, Kryštof Zeman, Laszlo Nemeth, and Dmitri Jdanov. 2021. “Baby Bust in the Wake of the COVID-19 Pandemic? First Results from the New STFF Data Series.” SocArXiv. March 24. doi:10.31235/osf.io/mvy62

Abstract: Past evidence on fertility responses to external shocks, including economic recessions and the outbreaks of infectious diseases, show that people often put their childbearing plans on hold in uncertain times. We study the most recent data on monthly birth trends to analyse the initial fertility responses to the outbreak of the COVID-19 pandemic. Our research, based on new Short-Term Fertility Fluctuations (STFF) data series (https://www.humanfertility.org/cgi-bin/stff.php), embedded in the Human Fertility Database (HFD), shows the initial signs of the expected “birth recession”. Monthly number of births in many countries fell sharply between October 2020 and the most recent month observed, often bringing about a clear reversal of the previous trend. Across 17 countries with lower fluctuations in births, the number of births fell on average by 5.1% in November 2020, 6.5% in December 2020 and 8.9% in January 2021 when compared with the same month of the previous year. Spain sustained the sharpest drop in the number of births among the analysed countries, with the number of births plummeting by 20% in December 2020 and January 2021. The combined effect of rising mortality and falling birth rates is disrupting the balance of births and deaths in many countries, pushing natural population increase to record low levels in 2020 and 2021.

Additional wealth and unearned income effects: An extra dollar of unearned income in a given period reduces pre-tax labor earnings by about 50 cents, decreases total labor taxes by 10 c, & increases consumption by 60 c

How Americans Respond to Idiosyncratic and Exogenous Changes in Household Wealth and Unearned Income. Mikhail Golosov, Michael Graber, Magne Mogstad, and David Novgorodsky. Becker Friedman Institute, Working Paper 2021-76. Jul 2021.  https://bfi.uchicago.edu/wp-content/uploads/2021/06/BFI_WP_2021-76.pdf

Abstract: We study how Americans respond to idiosyncratic and exogenous changes in household wealth and unearned income. Our analyses combine administrative data on U.S. lottery winners with an event study design that exploits variation in the timing of lottery wins. Our first contribution is to estimate the earnings responses to these windfall gains, finding significant and sizable wealth and income effects. On average, an extra dollar of unearned income in a given period reduces pre-tax labor earnings by about 50 cents, decreases total labor taxes by 10 cents, and increases consumption by 60 cents. These effects are heterogeneous across the income distribution, with households in higher quartiles of the income distribution reducing their earnings by a larger amount. Our second contribution is to develop and apply a rich life-cycle model in which heterogeneous households face non-linear taxes and make earnings choices along both intensive and extensive margins. By mapping this model to our estimated earnings responses, we obtain informative bounds on the impacts of two policy reforms: an introduction of UBI and an increase in top marginal tax rates. Our last contribution is to study how additional wealth and unearned income affect a wide range of behavior, including geographic mobility and neighborhood choice, retirement decisions and labor market exit, family formation and dissolution, entry into entrepreneurship, and job-to-job mobility.

JEL Codes: D15, J22, H21, H31, H53

Keywords: income effects; labor supply elasticities; lottery winning; taxation; universal basic income; wealth effects

Historical language records reveal a surge of cognitive distortions in recent decades: Maybe recent socioeconomic changes, new technology, and social media are associated with a surge of those distortions

Historical language records reveal a surge of cognitive distortions in recent decades. Johan Bollen et al. Proceedings of the National Academy of Sciences, July 27, 2021 118 (30) e2102061118; https://doi.org/10.1073/pnas.2102061118

Significance: Can entire societies become more or less depressed over time? Here, we look for the historical traces of cognitive distortions, thinking patterns that are strongly associated with internalizing disorders such as depression and anxiety, in millions of books published over the course of the last two centuries in English, Spanish, and German. We find a pronounced “hockey stick” pattern: Over the past two decades the textual analogs of cognitive distortions surged well above historical levels, including those of World War I and II, after declining or stabilizing for most of the 20th century. Our results point to the possibility that recent socioeconomic changes, new technology, and social media are associated with a surge of cognitive distortions.

Abstract: Individuals with depression are prone to maladaptive patterns of thinking, known as cognitive distortions, whereby they think about themselves, the world, and the future in overly negative and inaccurate ways. These distortions are associated with marked changes in an individual’s mood, behavior, and language. We hypothesize that societies can undergo similar changes in their collective psychology that are reflected in historical records of language use. Here, we investigate the prevalence of textual markers of cognitive distortions in over 14 million books for the past 125 y and observe a surge of their prevalence since the 1980s, to levels exceeding those of the Great Depression and both World Wars. This pattern does not seem to be driven by changes in word meaning, publishing and writing standards, or the Google Books sample. Our results suggest a recent societal shift toward language associated with cognitive distortions and internalizing disorders.

Keywords: cognitive distortionsinternalizing disordershistorical language analysis

Check also Individuals with depression express more distorted thinking on social media. Krishna C. Bathina, Marijn ten Thij, Lorenzo Lorenzo-Luaces, Lauren A. Rutter & Johan Bollen. Nature Human Behaviour, February 11 2021. https://www.bipartisanalliance.com/2021/02/individuals-with-depression-express.html

“You don’t believe in God? You ain’t Black”: Identifying as atheist elicits identity denial from Black ingroup members

Howard, S., Kennedy, K. C., & Vine, K. T. (2021). “You don’t believe in God? You ain’t Black”: Identifying as atheist elicits identity denial from Black ingroup members. Cultural Diversity and Ethnic Minority Psychology, Jul 2021. https://doi.org/10.1037/cdp0000397

Abstract: Objective: Anecdotal narratives and recent qualitative research with Black atheists document experiences of racial identity denial from the target’s perspective. However, no research to date has examined whether Black perceivers perceive Black atheists as being weakly identified with their race. Because belief in God is often inextricably linked with Black racial identity in the Black community, we hypothesized that Black atheists would be perceived as less Black than nonatheists.

Method: Black/African American adults (n = 343) were randomly assigned to view one of three Black individual’s social networking profiles (i.e., a Christian, an atheist, and religion not explicitly mentioned). After, they reported their perceptions of the targets’ perceived racial identity and trustworthiness.

Results: Black participants, regardless of how strongly they identified racially, perceived a Black Atheist as less racially identified than a Black Christian or someone whose religious affiliation was unknown. Additionally, a Black atheist was perceived as less trustworthy than a Black Christian.

Conclusions: Black atheists experience general anti-atheist bias (e.g., perceived as untrustworthy), as well as unique anti-atheist bias in the form of racial identity denial. These findings extend previous research on identity denial and intragroup dynamics and advance our understanding of the relationship between religious identification and racial identity denial within the Black community.

Sexual Orientation, Sexual Arousal, and Finger Length Ratios in Women

Sexual Orientation, Sexual Arousal, and Finger Length Ratios in Women. Luke Holmes, Tuesday M. Watts-Overall, Erlend Slettevold, Dragos C. Gruia, Jamie Raines & Gerulf Rieger. Archives of Sexual Behavior, Jul 23 2021. https://link.springer.com/article/10.1007%2Fs10508-021-02095-5

Abstract: In general, women show physiological sexual arousal to both sexes. However, compared with heterosexual women, homosexual women are more aroused to their preferred sex, a pattern typically found in men. We hypothesized that homosexual women’s male-typical arousal is due to their sex-atypical masculinization during prenatal development. We measured the sexual responses of 199 women (including 67 homosexual women) via their genital arousal and pupil dilation to female and male sexual stimuli. Our main marker of masculinization was the ratio of the index to ring finger, which we expected to be lower (a masculine pattern) in homosexual women due to increased levels of prenatal androgens. We further measured observer- and self-ratings of psychological masculinity–femininity as possible proxies of prenatal androgenization. Homosexual women responded more strongly to female stimuli than male stimuli and therefore had more male-typical sexual responses than heterosexual women. However, they did not have more male-typical digit ratios, even though this difference became stronger if analyses were restricted to white participants. Still, variation in women's digit ratios did not account for the link between their sexual orientation and their male-typical sexual responses. Furthermore, homosexual women reported and displayed more masculinity than heterosexual women, but their masculinity was not associated with their male-typical sexual arousal. Thus, women’s sexual and behavioral traits, and potential anatomical traits, are possibly masculinized at different stages of gestation.

Discussion

The present data confirmed that homosexual women had more male-typical sexual arousal patterns than heterosexual women, as indicated by both their genital arousal and their pupil dilation. However, there was no evidence that they had more male-typical digit ratios, or that digit ratios mediated the relationship between women’s sexual orientation and their male-typical sexual arousal patterns. Moreover, even though homosexual women were more masculine than heterosexual women in their self-reports or via observer ratings, this pattern, too, did not explain their male-typical arousal patterns.

The finding that homosexual women had stronger responses to their preferred sex than heterosexual women is consistent with previous research both for genital arousal and pupil dilation (Chivers et al., 2004, 2007; Rieger et al., 2015, 2016). However, the finding that 2D:4D was not significantly lower in homosexual women than heterosexual women is puzzling, as it was confirmed previously in a meta-analysis (Grimbos et al., 2010). This may have been due to methodological reasons: Although between-rater reliability was high, and computer-assisted measurement techniques, such as those employed in the current study, have been shown to have the highest reliability compared to other methods of measuring 2D:4D (Allaway et al., 2009), we cannot say with certainty that our measure was valid.

Indeed, there is an ongoing debate about the utility of 2D:4D: Although it is regarded as a valid measure with respect to sex differences and female sexual orientation differences, it is also the case that there is much variability in this measure across individuals, and findings only apply on aggregate and do not apply to single people (Swift-Gallant et al., 2020). Furthermore, the aforementioned meta-analysis suggested a publication bias in reported relationships of sexual orientation with 2D:4D (Grimbos et al., 2010), and the true effect could therefore be smaller than usually published. In the present data, the strongest linear relationship of sexual orientation with 2D:4D was r (or β) = − 0.12 in the right hand. With this effect, post hoc power analyses indicated a minimum sample of 542 women for it to be significant. If our a priori sample size estimate had returned such a large number, we would have considered it an unreasonable goal for a laboratory-based study like ours.

Another possible explanation for the present null finding with respect to 2D:4D is the ethnic makeup of the sample. We did not factor this into planning the present study because the meta-analysis pointed to an ethnicity effect only in men and not in women (Grimbos et al., 2010), although other research has found an influence of ethnicity on 2D:4D in women (Lippa, 2003). Indeed, excluding all non-Caucasian participants from the present sample made the association between 2D:4D and sexual orientation stronger (although still nonsignificant) in both hands (Fig. 4). Thus, future research measuring the relationship between 2D:4D and sexual orientation may wish to either employ a racially homogenous participant sample, or recruit enough participants that per-race comparisons are feasible. Note that even within the white sample, 2D:4D did not appear to explain (mediate) any relationship of women's sexual orientation with their sexual response patterns.

It is impossible to draw any conclusions from the present data about whether the relationship between 2D:4D and sexual orientation mediates the relationship between sexual orientation and sexual responses, simply because 2D:4D in itself did not relate to sexual orientation. With regard to masculinity–femininity, if anything, statistically controlling for any of the three masculinity–femininity variables made the correspondence of women’s sexual orientation with their male-typical sexual arousal stronger. This pattern—a strengthening of the effect of sexual orientation on sexual response when measures of behavioral masculinity are statistically controlled for—has been previously noted (Rieger et al., 2016). In combination with present findings, it appears unlikely that it was previously a chance finding.

If one assumed for a moment that the present findings are accurate, what could be their reasons? For females, it is possible that there exist several “sensitive periods” of masculinization during prenatal development, and that these periods differ for different traits (McCarthy et al., 2018; Xu et al., 2019). At least in non-human primates, exposure to testosterone at different stages of gestation may masculinize sexual behaviors independently from non-sexual behaviors (Goy et al., 1988). Specifically, Goy et al. reported that female rhesus macaques exposed to testosterone during their prenatal development had different behavioral outcomes depending on the timing, with those exposed early in gestation displaying male-typical sexual behaviors (e.g., mounting other females) and those exposed late in gestation displaying male-typical non-sexual behaviors (e.g., rough play). It is possible that behavioral traits and sexual arousal patterns are masculinized at different stages of development in humans also, and thus, are not necessarily interlinked within individuals—for example, those who have male-typical arousal may not have male-typical gender-related behaviors and vice versa.

A final point concerns bisexual women, who were intermediate between heterosexual and homosexual women in their sexual arousal and masculinity–femininity, but were significantly more feminine in their 2D:4D. One hypothesis is that due to intermediate dosages of genetic or prenatal hormonal influences, bisexual individuals, who could be considered to have sexual orientations between heterosexual and homosexual, also fall intermediate with respect to correlates of sexual orientation (Rieger et al., 2020). Thus, regarding bisexual women's 2D:4D, we assumed that they could also be intermediate between heterosexual and homosexual women on this measure. Contrary to this assumption, bisexual women had more feminine 2D:4D than both heterosexual and homosexual women (Table 1). It has been proposed that personality differences between homosexual and heterosexual women may be caused by exposure to androgens during prenatal development, whereas the distinct personality traits of bisexual individuals (e.g., higher sociosexuality compared to heterosexual and homosexual) may be a correlate of their higher levels of postnatal androgens (Lippa, 2020). If the present findings are valid, they would suggest that bisexual women also differ from heterosexual and homosexual women with respect to prenatal androgenization, but this would imply that they have been less masculinized than other groups, and we cannot offer an explanation for why this would be the case.

In sum, the findings of the present research suggest that there is no link between the male-typical sexual responses of homosexual women and putative markers of prenatal androgenization. Other purported markers of androgen exposure may reveal a different pattern than the one reported here. Such markers include the distance between the anus and the genitalia (Barrett et al., 2018) and otoacoustic emissions, which are tiny sounds emitted by the inner ear (McFadden & Pasanen, 1998). Another avenue for future research would involve individuals with conditions affecting the availability of androgens, or their sensitivity to them. To our knowledge, no studies to date investigated the arousal patterns of women with CAH. If androgen exposure does indeed impact sexual responses—and given the apparent impact of excessive androgens on the sexual orientation of women with CAH (Meyer-Bahlburg et al., 2008; Zucker et al., 1996)—women with CAH may show male-typical specificity in their sexual arousal.