Typical courses and critical thinking skills acquired during a semester are not sufficient to prompt skepticism about myth statements

Class Dis-Mythed: Exploring the Prevalence and Perseverance of Myths in Upper-Level Psychology Courses. Michael Root and Caroline Stanley. https://www.researchgate.net/publication/317646288_Class_Dis-Mythed_Exploring_the_Prevalence_and_Perseverance_of_Myths_in_Upper-Level_Psychology_Courses

Description: Undergraduates (N = 117) from two mid-sized universities enrolled in one of three psychology courses (Cognitive Psychology, Learning & Memory, or Personality) completed surveys about commonly held psychology myths related to the course in which they were enrolled. Students completed the surveys at the beginning and end of the semester. The purpose of our study was twofold. First, we wanted to measure the prevalence of myth beliefs in undergraduates taking upper level psychology courses. Second, we wanted to discern whether course content alone (i.e., readings, lectures, class activities, tests, and assignments) was sufficient to disabuse undergraduates of their myth beliefs. Although all three courses had prerequisite psychology courses, beginning-of-semester responses indicated that students in all three classes believed a majority of the myths related to the subject matter of their course. End-of-semester responses indicated that, unless a myth was explicitly debunked in a course (e.g., material in a Learning & Memory course contradicted their belief that people have different learning styles), myth beliefs persisted throughout the semester. Our results suggest that typical course content and any critical thinking skills acquired during a semester is not sufficient to prompt skepticism about myth statements. Instead, we argue that a more effective strategy to dispel common myths that may hinder undergraduates reasoning and critical thinking skills is for instructors to make undergraduates explicitly aware of these myths and how research fails to support them.

Check also: Dispelling the Myth: Training in Education or Neuroscience Decreases but Does Not Eliminate Beliefs in Neuromyths. Kelly Macdonald et al. Frontiers in Psychology, Aug 10 2017. http://www.bipartisanalliance.com/2017/08/training-in-education-or-neuroscience.html

Peak olfactory acuity is 9pm... Maybe to help finding sexual mates.

The Influence of Circadian Timing on Olfactory Sensitivity. Rachel S Herz, Eliza Van Reen, David Barker, Cassie J Hilditch, Ashten Bartz, Mary A Carskadon. Chemical Senses, bjx067, https://doi.org/10.1093/chemse/bjx067

Abstract: Olfactory sensitivity has traditionally been viewed as a trait that varies according to individual differences but is not expected to change with one’s momentary state. Recent research has begun to challenge this position and time of day has been shown to alter detection levels. Links between obesity and the timing of food intake further raise the issue of whether odor detection may vary as a function of circadian processes. To investigate this question, thirty-seven (21 male) adolescents (M age =13.7 years) took part in a 28-hr forced-desynchrony (FD) protocol with 17.5 hours awake and 10.5 hours of sleep, for seven FD cycles. Odor threshold was measured using Sniffin’ Sticks six times for each FD cycle (total threshold tests = 42). Circadian phase was determined by intrinsic period derived from dim light melatonin onsets. Odor threshold showed a significant effect of circadian phase, with lowest threshold occurring on average slightly after the onset of melatonin production, or about 1.5 ○ (approximately 21:08 hours). Considerable individual variability was observed, however, peak olfactory acuity never occurred between 80.5 ○- 197.5 ○ (~02:22-10:10 hours). These data are the first to show that odor threshold is differentially and consistently influenced by circadian timing, and is not a stable trait. Potential biological relevance for connections between circadian phase and olfactory sensitivity are discussed.

Keywords: adolescents, food intake, forced desynchrony, individual differences, odor threshold, trait-state

Citizens believe others, especially their political rivals, gravitate toward like-minded news

Public Perceptions of Partisan Selective Exposure. Perryman, Mallory R. The University of Wisconsin - Madison, ProQuest Dissertations Publishing, 2017. 10607943. https://search.proquest.com/openview/20d6e3befcf61455779aebe39b91d29f/1?pq-origsite=gscholar&cbl=18750&diss=y

From the introduction:

This dissertation investigates citizens’ perceptions of where others turn to for news, i.e., perceived exposure. In two empirical studies, I demonstrate how the assumptions that perceivers make about media and the assumptions they make about other people ultimately produce a perception of perceived partisan selective exposure. I test the extent to which citizens believe that they and others engage in selective media habits and examine the cognitive shortcuts that perceivers use to make such assessments. Ultimately, this investigation concludes that citizens believe others, especially their political rivals, gravitate toward like-minded news.

Though this is the first examination of public perceptions of selective exposure, it is not the first study to try and gauge perceptions of others’ media use. Capturing beliefs about others’ media exposure originated with research into perceived media effects, an avenue of research concerned with the ways in which people believe media impact other people. It is easy to see how  perceived exposure is a core tenet of perceived media effects research: In order to believe others have been affected by a media message, a perceiver must first assume the others-in-question have been exposed to that message.

Understanding why citizens believe certain others interact with certain media messages thus requires revisiting the basic principles of perceived media effect research –- research that explores how individuals make assumptions other people, about media, and about what happens when other people encounter that media.

Check also: The Myth of Partisan Selective Exposure: A Portrait of the Online Political News Audience. Jacob L. Nelson, and James G. Webster. Social Media + Society, https://doi.org/10.1177/2056305117729314

And: Echo Chamber? What Echo Chamber? Reviewing the Evidence. Axel Bruns. Future of Journalism 2017 Conference. http://www.bipartisanalliance.com/2017/09/echo-chamber-what-echo-chamber.html

And: Stanley, M. L., Dougherty, A. M., Yang, B. W., Henne, P., & De Brigard, F. (2017). Reasons Probably Won’t Change Your Mind: The Role of Reasons in Revising Moral Decisions. Journal of Experimental Psychology: General. https://doi.org/10.1037/xge0000368

And: Consumption of fake news is a consequence, not a cause of their readers’ voting preferences
Kahan, Dan M., Misinformation and Identity-Protective Cognition (October 2, 2017). SSRN, https://ssrn.com/abstract=3046603

And: Fake news and post-truth pronouncements in general and in early human development. Victor Grech.Early Human Development, https://doi.org/10.1016/j.earlhumdev.2017.09.017

And: Science Denial Across the Political Divide -- Liberals and Conservatives Are Similarly Motivated to Deny Attitude-Inconsistent Science. Anthony N. Washburn, Linda J. Skitka. Social Psychological and Personality Science, 10.1177/1948550617731500

And: Biased Policy Professionals. Sheheryar Banuri, Stefan Dercon, and Varun Gauri. World Bank Policy Research Working Paper 8113. https://t.co/Jga1EUEkbF.

And: Dispelling the Myth: Training in Education or Neuroscience Decreases but Does Not Eliminate Beliefs in Neuromyths. Kelly Macdonald et al. Frontiers in Psychology, Aug 10 2017. http://www.bipartisanalliance.com/2017/08/training-in-education-or-neuroscience.html

And: Wisdom and how to cultivate it: Review of emerging evidence for a constructivist model of wise thinking. Igor Grossmann. European Psychologist, in press. Pre-print: https://osf.io/preprints/psyarxiv/qkm6v/

And: Individuals with greater science literacy and education have more polarized beliefs on controversial science topics. Caitlin Drummond and Baruch Fischhoff. Proceedings of the National Academy of Sciences, vol. 114 no. 36, pp 9587–9592, doi: 10.1073/pnas.1704882114

And: Expert ability can actually impair the accuracy of expert perception when judging others' performance: Adaptation and fallibility in experts' judgments of novice performers. By Larson, J. S., & Billeter, D. M. (2017). Journal of Experimental Psychology: Learning, Memory, and Cognition, 43(2), 271–288. http://dx.doi.org/10.1037/xlm0000304

And:  Bottled Water and the Overflowing Nanny State, by Angela Logomasini. How Misinformation Erodes Consumer Freedom. CEI, February 17, 2009
http://www.bipartisanalliance.com/2009/02/bottled-water-and-overflowing-nanny.html

And Competing cues: Older adults rely on knowledge in the face of fluency. By Brashier, Nadia M.; Umanath, Sharda; Cabeza, Roberto; Marsh, Elizabeth J.
Psychology and Aging, Vol 32(4), Jun 2017, 331-337. http://www.bipartisanalliance.com/2017/07/competing-cues-older-adults-rely-on.html

Psychopaths are willing and able to disclose how they are under conditions of confidentiality, and do not mind being so

Kelley, S. E., Edens, J. F., Donnellan, M. B., Mowle, E. N. and Sörman, K. (), Self- and Informant Perceptions of Psychopathic Traits in Relation to the Triarchic Model. Journal of Personality. Accepted Author Manuscript. doi:10.1111/jopy.12354

Abstract

Objective: The validity of self-report psychopathy measures may be undermined by characteristics thought to be defining features of the construct, including poor self-awareness, pathological lying, and impression management. The current study examined agreement between self- and informant perceptions of psychopathic traits captured by the triarchic model (Patrick, Fowler, & Krueger, 2009) and the extent to which psychopathic traits are associated with socially desirable responding.

Method: Participants were undergraduate roommate dyads (N = 174; Mage = 18.9 years; 64.4% female; 59.8% Caucasian) who completed self- and informant-reports of boldness, meanness, and disinhibition.

Results: Self-reports of psychopathic traits reasonably aligned with the perceptions of informants (rs = .36 - .60) and both predicted various types of antisocial behaviors, although some associations were only significant for monomethod correlations. Participants viewed by informants as more globally psychopathic did not engage in greater positive impression management. However, this response style significantly correlated with self- and informant-reported boldness, suppressing associations with antisocial behavior.

Conclusions: These findings suggest that participants are willing and able to disclose psychopathic personality traits in research settings under conditions of confidentiality. Nonetheless, accounting for response style is potentially useful when using self-report measures to examine the nature and correlates of psychopathic traits.

Higher paternal age at offspring conception increases de novo genetic mutations & the children would be less likely to survive and reproduce

Older fathers' children have lower evolutionary fitness across four centuries and in four populations. Ruben Arslan et al. Proceedings of the Royal Society: Biological Sciences, Volume 284, issue 1862, September 13 2017. DO 10.1098/rspb.2017.1562

Abstract: Higher paternal age at offspring conception increases de novo genetic mutations. Based on evolutionary genetic theory we predicted older fathers' children, all else equal, would be less likely to survive and reproduce, i.e. have lower fitness. In sibling control studies, we find support for negative paternal age effects on offspring survival and reproductive success across four large populations with an aggregate N > 1.4 million. Three populations were pre-industrial (1670–1850) Western populations and showed negative paternal age effects on infant survival and offspring reproductive success. In twentieth-century Sweden, we found minuscule paternal age effects on survival, but found negative effects on reproductive success. Effects survived tests for key competing explanations, including maternal age and parental loss, but effects varied widely over different plausible model specifications and some competing explanations such as diminishing paternal investment and epigenetic mutations could not be tested. We can use our findings to aid in predicting the effect increasingly older parents in today's society will have on their children's survival and reproductive success. To the extent that we succeeded in isolating a mutation-driven effect of paternal age, our results can be understood to show that de novo mutations reduce offspring fitness across populations and time periods.

Menarcheal timing is accelerated by favorable nutrition but unrelated to developmental cues of mortality or familial instability

Menarcheal timing is accelerated by favorable nutrition but unrelated to developmental cues of mortality or familial instability in Cebu, Philippines. Moira A. Kyweluka et al. Evolution and Human Behavior, https://doi.org/10.1016/j.evolhumbehav.2017.10.002

Abstract: Understanding the determinants of pubertal timing, particularly menarche in girls, is an important area of investigation owing to the many health, psychosocial, and demographic outcomes related to reproductive maturation. Traditional explanations emphasized the role of favorable nutrition in maturational acceleration. More recently, work has documented early maturity in relation to markers of familial and environmental instability (e.g. paternal absence), which are hypothesized to serve as cues triggering adaptive adjustment of life history scheduling. While these studies hint at an ability of human females to accelerate maturity in stressful environments, most have focused on populations characterized by energetic excess. The present study investigates the role of developmental nutrition alongside cues of environmental risk and instability (maternal absence, paternal absence, and sibling death) as predictors of menarcheal age in a well-characterized birth cohort born in 1983 in metropolitan Cebu, the Philippines. In this sample, which was marked by a near-absence of childhood overweight and obesity, we find that menarcheal age is not predicted by cues of risk and instability measured at birth, during childhood and early adolescence, but that infancy weight gain and measures of favorable childhood nutrition are strong predictors of maturational acceleration. These findings contrast with studies of populations in which psychosocial stress and instability co-occur with excess weight. The present findings suggest that infancy and childhood nutrition may exert greater influence on age at menarche than psychosocial cues in environments characterized by marginal nutrition, and that puberty is often delayed, rather than accelerated, in the context of stressful environments.

Keywords: Life history theory; Puberty; Reproductive timing; Human growth; Fertility milestones

Automated Driving: Use With Caution

Automated driving: Safety blind spots. Ian Y. Noy, David Shinar, William J. Horrey. Safety Science, Volume 102, February 2018, Pages 68–78. https://doi.org/10.1016/j.ssci.2017.07.018

Highlights
•    Automated driving has the potential to improve traffic safety in the long term.
•    For the foreseeable future, partially AD present unwitting consequences.
•    Drivers’ role will change and lead to potential confusion or traffic conflicts.
•    Human factors research is needed address new questions of partial automation.
•    Integration within the broader cyber-physical world is an emerging challenge.
•    This paper identifies areas that require explicit and urgent scientific exploration.

Abstract: Driver assist technologies have reached the tipping point and are poised to take control of most, if not all, aspects of the driving task. Proponents of automated driving (AD) are enthusiastic about its promise to transform mobility and realize impressive societal benefits. This paper is an attempt to carefully examine the potential of AD to realize safety benefits, to challenge widely-held assumptions and to delve more deeply into the barriers that are hitherto largely overlooked. As automated vehicle (AV) technologies advance and emerge within a ubiquitous cyber-physical world they raise additional issues that have not yet been adequately defined, let alone researched. Issues around automation, sociotechnical complexity and systems resilience are well known in the context of aviation and space. There are important lessons that could be drawn from these applications to help inform the development of automated driving. This paper argues that for the foreseeable future, regardless of the level of automation, a driver will continue to have a role. It seems clear that the benefits of automated driving, safety and otherwise, will accrue only if these technologies are designed in accordance with sound cybernetics principles, promote effective human-systems integration and gain the trust by operators and the public.

Keywords: Automated driving; Safety; Driver-vehicle interaction; Psychology; Autonomous vehicles

Criminal behavior transmission is strongest from mothers to daughters, then by mothers to sons, fathers to daughters, and fathers to sons

A systematic review and meta-analysis of the intergenerational transmission of criminal behavior. Sytske Besemer et al. Aggression and Violent Behavior, https://doi.org/10.1016/j.avb.2017.10.004

Highlights
•    This meta-analysis synthesized results for around 3 million children.
•    Risk for criminal behavior is roughly 2.4 times higher for kids with criminal parents.
•    Studies considering covariates show the risk to be about 1.8 times higher.
•    Transmission was strongest from mothers to daughters, lowest for fathers to sons.
•    Transmission appeared stronger for cohorts born after 1981.

Abstract: Children whose parents exhibit criminal behavior (CB) appear to have an increased risk of displaying CB themselves. We conducted a systematic review and pooled results from 23 samples in 25 publications (including 3,423,483 children) in this meta-analysis of intergenerational transmission of CB. On average, children with criminal parents were at significantly higher risk for CB compared with children without criminal parents (pooled OR = 2.4). Studies taking into account covariates also showed increased risk for CB (pooled OR = 1.8). Transmission was strongest from mothers to daughters, followed by mothers to sons, fathers to daughters, and fathers to sons. Moreover, transmission appeared stronger for cohorts born after 1981. When we examined methodological quality and other characteristics of studies, response rates, sample size, or use of official records vs. self- or other-reports of parental CB did not moderate outcomes. However, we found stronger transmission for samples that used convenience or case-control sampling, and in studies in which parental CB clearly preceded offspring CB. We discuss mechanisms underlying intergenerational transmission, including social learning, criminogenic environments, biological proneness, and criminal justice bias. Finally, we consider limitations and directions for future research as well as policy implications for breaking the cycle of intergenerational crime.

Keywords: Parental crime; Intergenerational transmission; Antisocial behavior; Criminal behavior; Longitudinal study

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On why is so strong the transmission mother-daughter: [it] could be that CB is less common for women, so women who engage in such behavior might be more deviant compared with men who engage in CB. This finding would be similar to the gender paradox observed in developmental psychopathology, wherein the gender for which the problem behavior is rarer, compared with the gender in which the problem behavior is more common, displays a more severe form or presentation of the problem behavior (Eme, 1992; Loeber & Keenan, 1994; Wasserman, McReynolds, Ko, Katz, & Carpenter, 2005). Even if mothers’ and fathers’ criminal behavior was not different in terms of its seriousness, it is far rarer for women to be convicted of crime compared with men. Thus, there may be more stigma – both in society in general, as well as in the law enforcement and criminal justice system – for women with histories of CB, who might also be more likely to be labeled as ―disturbed‖ rather than criminal (Hedderman & Gelsthorpe, 1997). Another explanation might be that mothers are more often the main caretakers of their children, such that maternal incarceration following conviction would be significantly more disruptive on children in the home. When fathers are incarcerated, children often stay with their mother; if mothers are incarcerated, children are more likely to move in with other family members or foster parents (Bloom, 1993; Fishman, 1983; Hissel, Bijleveld, & Kruttschnitt, 2011; Myers, Smarsh, Amlund-Hagen, & Kennon, 1999).

Yet another explanation could be that antisocial fathers who are absent might serve as a potential protective factor. Indeed, Jaffee, Moffitt, Caspi, and Taylor (2003) found that when fathers engaged in high levels of CB, the more time they lived with their children, the more problem behavior their children had. Farrington and Crago (2016) also found that intergenerational transmission of crime was stronger when children were not separated from their parents. Of note, previous studies (e.g. Farrington, Barnes, & Lambert, 1996: Rowe & Farrington, 1997) have suggested that intergenerational transmission is stronger for samegender relationships, which was not supported by the findings of the present meta-analysis. On the other hand, we did not find support for our prediction that intergenerational transmission would be stronger, overall, for male than female offspring Although boys are more vulnerable than girls to a host of neurodevelopmental disorders and to the effects of life stressors, it may be the case that, over longer spans of development, both genders are prone to the cascade of effects related to parental CB.

Education has positive impact on tax morale for net beneficiaries of the welfare state, &a negative one for net contributors

Education and tax morale. David Rodríguez-Justicia, Bernd Theilen. Journal of Economic Psychology, https://doi.org/10.1016/j.joep.2017.10.001

Highlights
•    We analyse two channels through which education shapes tax morale.
•    Tax morale of net receivers of welfare state benefits increases with education.
•    Tax morale of net contributors to the welfare state decreases with education.
•    A fairer tax system and better institutions raise tax morale of the highly educated.

Abstract: While the determinants of tax morale have been widely studied in the literature, surprisingly, the fundamental influence of education on tax morale has yet to be investigated. Given the insights from the psychological and political science literature about the role of education in the formation of social values, in this paper, we analyze two channels through which education shapes tax morale. We find that education has a positive impact on tax morale for those individuals that are net beneficiaries of the welfare state, and a negative impact for those that are net contributors. Furthermore, our results indicate that the more highly educated because of their better knowledge on public affairs exhibit higher levels of tax morale in countries that have better quality public services, a fairer tax system and higher quality institutions.

JEL classification: H26; H52; I25
Keywords: Tax morale; Tax compliance; Education; Welfare state benefits; Trust in public institutions

Rhesus macaques expect others to dynamically update their representations of unseen objects

What do monkeys know about others’ knowledge? Lindsey A. Drayton, Laurie R. Santos. Cognition, Volume 170, January 2018, Pages 201–208. https://doi.org/10.1016/j.cognition.2017.10.004

Highlights
•    Monkeys expect others to track a hidden object during a rotational displacement task.
•    Monkeys do not show a curse of knowledge bias.
•    Results are consistent with the hypothesis that monkeys represent what others know.

Abstract: Recently, comparative psychologists have suggested that primates represent others’ knowledge states. Evidence for this claim comes from studies demonstrating that primates expect others to maintain representations of objects when those objects are not currently visible. However, little work has explored whether nonhuman primates expect others to share the more sophisticated kinds of object knowledge that they themselves possess. We therefore investigated whether primates attribute to others knowledge that is acquired through the mental transformation of a static object representation. Specifically, we tested whether rhesus macaques (Macaca mulatta) expected a human demonstrator to solve a difficult rotational displacement task. In Experiment 1, monkeys watched a demonstrator hide a piece of fruit in one of two boxes. The monkey and the demonstrator then watched the boxes rotate 180°. We found that monkeys looked longer when the demonstrator reached into the box that did not contain the fruit, indicating that they expected her to be able to track the fruit to its current location. In Experiment 2, we ruled out the possibility that monkeys simply expected the demonstrator to search for the food in its true location. When the demonstrator did not witness the rotation event, monkeys looked equally long at the two reaching outcomes. These results are consistent with the interpretation that rhesus macaques expect others to dynamically update their representations of unseen objects.

Keywords: Theory of mind; Knowledge representation; Comparative cognition; Object knowledge

Leaving late: Understanding the extent and predictors of college late departure

Leaving late: Understanding the extent and predictors of college late departure. Zachary Mabel, Tolani A. Britton. Social Science Research, https://doi.org/10.1016/j.ssresearch.2017.10.001

Abstract: Research on college dropout has largely addressed early exit from school, even though a large share of students who do not earn degrees leave after their second year. In this paper, we offer new evidence on the scope of college late departure. Using administrative data from Florida and Ohio, we conduct an event history analysis of the dropout process as a function of credit attainment. Our results indicate that late departure is widespread, particularly at two- and open-admission four-year institutions. We estimate that 14 percent of all entrants to college and one-third of all dropouts completed at least three-quarters of the credits that are typically required to graduate before leaving without a degree. Our results also indicate that the probability of departure spikes as students near the finish line. Amidst considerable policy attention towards improving student outcomes in college, our findings point to promising new avenues for intervention to increase postsecondary attainment.

Keywords: Postsecondary completion; College dropout; Late departure; Human capital

How Disgust Becomes Law

Patrick, Carlton and Lieberman, Debra, How Disgust Becomes Law (August 24, 2017). Forthcoming in The Moral Psychology of Disgust, Nina Strohminger & Victor Kumar (Eds.), London: Rowman & Littlefield, 2018. https://ssrn.com/abstract=3025885

Abstract: This chapter provides a psychological examination of the many ways in which disgust permeates the law. Using an evolutionary lens, the chapter explores the various adaptive functions of disgust, and shows how those functions can be co-opted by psychological systems designed to generate and enforce moral norms. In doing so, the chapter also provides an explanation for why and how many of the behaviors we view as "disgusting" tend to become behaviors we label "wrong."

Keywords: evolutionary analysis in law, legal theory, disgust and the law, law and psychology, behavioral biology, morality, evolutionary psychology

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A second way that disgust is used by systems sensitive to alliance formation and group condemnation relates to communication. When individuals broadcast signals of disgust, they provide a means to infer the likelihood of alliance formation in the service of condemning a particular behavior. Personal disgust, when echoed by another person and then another person and then another, is a cue of mental alliance that can facilitate the formation of a coalition targeting particular individuals engaging in the disgust eliciting act. Disgust is not unique in this respect. Hearing the terms “I hate people who tailgate on the highway” can rally the troops as well. President Trump (and he is hardly the first) has continually attempted to incite fear and anger in an attempt to marginalize Mexicans seeking to immigrate to the US. These kinds of phrases give an indication of others’ willingness to form an alliance condemning others. In this way, disgust language and facial expressions can either be or not be actual felt disgust. One can personally feel disgust and communicate this, or one can merely use the language of disgust.

Disgust originates largely to reduce contact with foreigners, and the deviant or marginalized

Rottman, J., DeJesus, J. M., & Gerdin, E. (forthcoming). The social origins of disgust. In N. Strohminger & V. Kumar (Eds.), The moral psychology of disgust. London: Rowman & Littlefield. http://www.joshuarottman.com/publications.html

Despite being perfectly nutritious, consuming bugs is considered gross in many cultures [...] What is the function of such an irrational response, one that may continue to endanger the natural environment? Do people experience disgust toward insects because of perceived disease risks? Are people reacting to the reminder that they are eating an animal, in the same way that many people react negatively to eating a whole fish (with its head and eyes) compared to a fish fillet? We argue that social risks may instead be motivating this reaction. More broadly, moving beyond the example of entomophagy, we claim that disgust is much more deeply enmeshed in social and moral considerations than has been previously acknowledged. [...] In this chapter, we propose an alternative to the recurrent claim that disgust evolved for the sole purpose of facilitating the avoidance of toxins and infectious disease [...]

We do not deny that disease avoidance is a crucial element of disgust, but we believe that there is more to the story. We argue that a central component of the adaptive value of disgust lies in the motivation it provides for reducing contact with people who are considered to be deviant or marginalized, both for disease-related and reputation-related reasons (see Chudek and Henrich 2011, for a discussion of the adaptive function of social norms). We hereby introduce the “Social Origins” hypothesis as a crucial addition to the Physical Origins hypothesis to provide a more complete evolutionary account of disgust. According to our hypothesis, disgust originated largely as a functional response for preventing contact with foreigners or people acting in non-normative ways. This response serves a dual adaptive purpose: reducing human-borne illnesses and maintaining reputational status within one’s social group, either separately or simultaneously. Therefore, while avoiding pathogens is a crucial component of a full explanation of disgust’s origins and functions, we argue that simple disease avoidance was not the sole or even the primary driver of the evolution of disgust in humans.

Manipulating courtship opportunities made Drosophila pseudo. sing longer, faster, and fly and move faster

Mate choice intensifies motor signalling in Drosophila. Allan Debelle et al. Animal Behaviour, Volume 133, November 2017, Pages 169–187. https://doi.org/10.1016/j.anbehav.2017.09.014

Highlights
•    We experimentally increased or decreased sexual selection in Drosophila populations.
•    We perform an in-depth analysis of the response of a motor signal (pulse rate).
•    Polyandrous males sing at a faster rate and do so for longer than monogamous males.
•    Fast song rates are associated with overall increased male motor performance.
•    Increasing the opportunity for mate choice increased male motor performance.

Mate choice has the potential to act on the evolution of motor performance via its direct influence on motor sexual signals. However, studies demonstrating this are rare. Here, we performed an in-depth analysis of Drosophila pseudoobscura courtship song rate, a motor signal under mate choice in this species, and analysed the response of this signal to sexual selection manipulation using experimental evolution. We show that manipulating the opportunity for sexual selection led to changes in song production rate and singing endurance, with males from the polyandrous populations producing faster song rates over longer time periods than males from monogamous populations. We also show that song rate was correlated with estimates of overall courtship vigour. Our results suggest that the action of mate choice on a motor signal has affected male motor performance displayed during courtship. We consider potential selective benefits associated with changes in motor performance, including condition-dependent signalling, and discuss the implications of these results for the study of motor signals under sexual selection.

Keywords: courtship song; Drosophila pseudoobscura; experimental evolution; interpulse interval; mate choice; motor performance; sexual selection

My commentary: Manipulating courtship opportunities made Drosophila pseudo. sing longer, faster, and fly and move faster. We are not so distant...

Sebastian Heilmann's Leninism Upgraded: Restoration and Innovation Under Xi Jinping

Event Recap -- Leninism Upgraded: Restoration and Innovation Under Xi Jinping. Sebastian Heilmann. Harvard's University Asia Center. April 13, 2017. https://asiacenter.harvard.edu/news/event-recap-%E2%80%93-leninism-upgraded-restoration-and-innovation-under-xi-jinping

When Xi Jinping assumed the leadership of the Chinese Communist Party (CCP) in late 2012, he was confronted with a serious erosion of central party control, informal power networks and entrenched corruption. How did Xi handle this existential threat and consolidate his leadership? At a Critical Issues Confronting China seminar titled “Leninism Upgraded: Restoration and Innovation Under Xi Jinping,” Sebastian Heilmann, President of the Mercator Institute for China Studies (MERICS) in Berlin, former Visiting Fellow at the Fairbank Center for Chinese Studies and former research fellow at the Harvard-Yenching Institute, explained this conundrum and distilled Xi’s approach to leadership into four restorations and five innovations.

First of all, in contrast to other post-1978 Chinese leaders, Xi prioritized political recentralization over economic restructuring in the implementation of the CCP’s agenda for “comprehensively deepening reforms” that has been under way since 2013.

Second, Xi boosted central authority by expanding disciplinary parallel bureaucracies and by implementing a relentless rectification campaign within the CCP under the cloak of anti-corruption.

Third, Xi has imposed “top-level design” (顶层设计), which stands for a system of centralized and top-down policy-making. This reversed the policies of the Deng Xiaoping and Jiang Zemin eras of the 1980s and 1990s, when policy intelligence was believed to be distributed across the political system, and local-level experimentation and bottom-up problem-solving were actively encouraged.

Fourth, Xi streamlined political power by aggressively attacking informal groupings within the party. In effect, tangible intra-party factional activity has reached a low point in CCP history.

In addition to these restorative measures that follow classical Leninist prescriptions, there are innovative elements in Xi’s approach to transform the CCP and make it fit for the 21st century.

First, Xi reorganized the party’s core executive around leader-driven central leading groups that predetermine decisions by formal top-level CCP organs. The separation of party organs from the management of economic affairs under previous leaders was downgraded to a mere “division of labor” (党政分工), thereby bringing party organs back into regular administrative and economic decision-making.

Second, with Wang Huning as his strategic advisor, Xi put much effort into hardening CCP ideological prescriptions, with the intention to delegitimize “Western values” and re-conceptualize the global political and economic order from a Chinese perspective. Though it appears questionable whether a monistic, uniform ideology can be imposed on Chinese society today that is characterized by very diverse lifestyles, value orientations and worldviews, the intensity of CCP ideological work under Xi is starkly different from the much more relaxed approach taken by his post-1978 predecessors.

Third, under Xi Jinping’s leadership, China abandoned Deng Xiaoping’s guiding foreign policy principle of “hiding your strength and biding your time” (韬光养晦). It became more assertive on a global level and sometimes aggressive in dealing with neighboring countries (such as South Korea recently). China has significantly expanded its maritime capabilities, and broadened its economic diplomacy and external funding to open up doors abroad. Meanwhile, China moved into spaces where U.S. presence is weak (such as Central Asia) or is being weakened (multilateral trade and climate policy). Instead of Deng’s “hide and bide” guideline, Xi’s foreign policy pursues the Maoist guerrilla principle of “avoiding the solid main force and instead moving toward the empty spaces” (避实就虚).

Fourth, China harnessed new technologies in cyberspace and social media for political communication. Based on the belief that public opinion in the internet era must be actively shaped and controlled by the CCP, the party’s cyber-administrators moved beyond clumsy censorship by using, for instance, refined algorithms to steer viewers away from subversive content to officially-approved content.

Fifth, under Xi’s leadership, China is building a system of “digital Leninism” through new types of business and social regulation. With financial and communication activities increasingly taking place online, Chinese regulators aim at compiling encompassing “social credit” scores, a kind of big data-enabled rating system, for every market participant, thereby gaining access to detailed and regularly updated data profiles of all companies and citizens.

What will Xi’s leadership look like after the 19th Party Congress in the fall of 2017? According to Heilmann, the best-case scenario is that Xi, after further consolidating his power, will feel secure enough to allow some degree of political relaxation and to decentralize some decision-making power, thereby reinvigorating bottom-up economic and policy dynamism. The worst-case scenario is further political and economic ossification as a result of rigid party control and expanded surveillance instruments. For international relations, Heilmann anticipated that, if liberal democracies continue to appear torn and weak, China will find an environment conducive to attacking “Western values” and promote its own version of political order based on non-liberal principles, not just domestically but also increasingly on a global level and in multilateral institutions.