Genetic heritage of the Baphuthi highlights an over-ethnicized notion of "Bushman" in the Maloti-Drakensberg, southern Africa.

Using contemporary people as proxies for ancient communities is a contentious but necessary practice in anthropology. In southern Africa, the distinction between the Cape KhoeSan and eastern KhoeSan remains unclear, as ethnicity labels have been changed through time and most communities were decimated if not extirpated. The eastern KhoeSan may have had genetic distinctions from neighboring communities who speak Bantu languages and KhoeSan further away; alternatively, the identity may not have been tied to any notion of biology, instead denoting communities with a nomadic "lifeway" distinct from African agro-pastoralism. The Baphuthi of the 1800s in the Maloti-Drakensberg, southern Africa had a substantial KhoeSan constituency and a lifeway of nomadism, cattle raiding, and horticulture. Baphuthi heritage could provide insights into the history of the eastern KhoeSan. We examine genetic affinities of 23 Baphuthi to discern whether the narrative of KhoeSan descent reflects distinct genetic ancestry. Genome-wide SNP data (Illumina GSA) were merged with 52 global populations, for 160,000 SNPs. Genetic analyses show no support for a unique eastern KhoeSan ancestry distinct from other KhoeSan or southern Bantu speakers. The Baphuthi have strong affinities with early-arriving southern Bantu-speaking (Nguni) communities, as the later-arriving non-Nguni show strong evidence of recent African admixture possibly related to late-Iron Age migrations. The references to communities as "San" and "Bushman" in historic literature has often been misconstrued as notions of ethnic/biological distinctions. The terms may have reflected ambiguous references to non-sedentary polities instead, as seems to be the case for the eastern "Bushman" heritage of the Baphuthi.

Developmental origins of anti-Black bias in White children in the United States: Exposure to and beliefs about racial inequality.

Anti-Black racism remains a pervasive crisis in the United States. Racist social systems reinforce racial inequalities and perpetuate prejudicial beliefs. These beliefs emerge in childhood, are difficult to change once entrenched in adolescence and adulthood, and lead people to support policies that further reinforce racist systems. Therefore, it is important to identify what leads children to form prejudicial beliefs and biases and what steps can be taken to preempt their development. This study examined how children's exposure to and beliefs about racial inequalities predicted anti-Black biases in a sample of 646 White children (4 to 8 years) living across the United States. We found that for children with more exposure to racial inequality in their daily lives, those who believed that racial inequalities were caused by intrinsic differences between people were more likely to hold racial biases, whereas those who recognized the extrinsic factors underlying racial inequalities held more egalitarian attitudes. Grounded in constructivist theories in developmental science, these results are consistent with the possibility that racial biases emerge in part from the explanatory beliefs that children construct to understand the racial inequalities they see in the world around them.

The neoliberal leaning of the neuroscience discourse when it deals with mental health and learning disorders.

Neuroscience attracted increasing attention in mass media during the last decades. Indeed, neuroscience advances raise high expectations in society concerning major societal issues such as mental health and learning difficulties. Unfortunately, according to leading experts, neuroscience advances have not yet benefited patients, students and socially deprived families. Yet, neuroscience findings are widely overstated and misrepresented in the media. Academic studies, briefly described here, showed that most data misrepresentations were already present in the neuroscience literature before spreading in mass media. This triumphalist neuroscience discourse reinforces a neuro-essentialist conception of mental disorders and of learning difficulties. By emphasizing brain plasticity, this discourse fuels the neoliberal ethics that overvalue autonomy, rationality, flexibility and individual responsibility. According to this unrealistic rhetoric, neuroscience-based techniques will soon bring inexpensive private solutions to enduring social problems. When considering the social consequences of this rhetoric, neuroscientists should refrain from overstating the interpretation of their observations in their scientific publications and in their exchanges with journalists.

Children's gender essentialism and prejudice: Testing causal links via an experimental manipulation.

Despite increases in visibility, gender-nonconforming young people continue to be at risk for bullying and discrimination. Prior work has established that gender essentialism in children correlates with prejudice against people who do not conform to gender norms, but to date no causal link has been established. The present study investigated this link more directly by testing whether children's gender essentialism and prejudice against gender nonconformity can be reduced by exposure to anti-essentialist messaging. Children ages 6-10 years of age (N = 102) in the experimental condition viewed a short video describing similarities between boys and girls and variation within each gender; children in the control condition (N = 102) viewed a corresponding video describing similarities between two types of climate and variation within each. Children then received measures of gender essentialism and prejudice against gender nonconformity. Finally, to ask whether manipulating children's gender essentialism extends to another domain, we included assessments of racial essentialism and prejudice. We found positive correlations between gender essentialism and prejudice against gender nonconformity; both also correlated negatively with participant age. However, we observed no differences between children in the experimental versus control conditions in overall essentialism or prejudice, indicating that our video was largely ineffective in manipulating essentialism. Accordingly, we were unable to provide evidence of a causal relationship between essentialism and prejudice. We did, however, see a difference between conditions on the discreteness measure, which is most closely linked to the wording in the video. This finding suggests that specific aspects of essentialism in young children may be modifiable. RESEARCH HIGHLIGHTS: Consistent with prior research, we found that greater gender essentialism was associated with greater prejudice against gender-nonconforming children; both decreased with age. We randomly assigned children to view either an anti-essentialist video manipulation or a control video to test if this relation was causal in nature. The anti-essentialist video did not reduce overall essentialism as compared to the control, so we did not find support for a causal link. We observed a reduction in the dimension of essentialism most closely linked to the anti-essentialist video language, suggesting the potential utility of anti-essentialist messaging.

Born This Way? National Collective Narcissism, Implicit Homophobia, and Homosexual Essentialism in Populist Poland.

Prejudice toward the LGBT community has become prevalent in Poland under the ultraconservative populist government. The results of three studies conducted between 2018 and 2019 (N1 = 879, N2 = 324, and N3 = 374) indicate that Polish collective narcissism-the belief that the exaggerated greatness of the nation is not recognized by others-is associated with implicit homophobia assessed as the intuitive disapproval of gay men and automatic evaluative preference of heterosexuality over homosexuality. Those associations were to a large extent explained by the relationships between collective narcissism and (1) the belief that groups defined by sexual orientations are essentially distinct; (2) the belief that homosexuality is a personal choice, not genetically determined or culturally universal. The experimental results of Study 3 indicated that inducing the belief that non-normative sexuality is genetically determined and culturally universal reduced automatic preference for heterosexuality over homosexuality (but not intuitive disapproval of gay men) across levels of collective narcissism (contrary to predictions). The obtained results complete the picture of the association of narcissistic beliefs about the nation and homophobia emerging from previous studies. National narcissism is linked not only to explicit but also to latent, implicit homophobia likely to be triggered by increased presence of national narcissism in public discourse. Moreover, national narcissism is linked to implicit homophobia, especially via the agentic belief that sexual orientation is a matter of choice. Changing this belief reduces implicit homophobia also among national narcissists.

Children's expectations about the stability of others' knowledge and preference states.

It is a crucial ability to predict others' psychological states across time and contexts. Focusing on cultural inventions such as songs and stories, we contrasted children's attributions of stability with others' knowledge and preference states across time and space and whether these attributions change as a function of children's familiarity with the known/liked items. Children (91 4-year-olds and 97 6-year-olds) were introduced to characters who knew or liked a song, a story, a game and a dance that were either novel or familiar. Children were asked whether the characters would still know/like these when they move to another city or when they grow up to be an adult. Both age groups expected these attributes to be more durable in the moving scenario compared with the growing-up scenario, but this trend became more robust with age. Whereas overall children did not judge knowledge as more durable than preferences, children found knowledge to be more enduring with age. The 6-year-olds' stability attributions also increased when known/liked items were familiar. These results suggest that, across the preschool years, children become more nuanced in their predictions about the future forms of knowledge and preference states.

Can we get human nature right?

Few questions in science are as controversial as human nature. At stake is whether our basic concepts and emotions are all learned from experience, or whether some are innate. Here, I demonstrate that reasoning about innateness is biased by the basic workings of the human mind. Psychological science suggests that newborns possess core concepts of "object" and "number." Laypeople, however, believe that newborns are devoid of such notions but that they can recognize emotions. Moreover, people presume that concepts are learned, whereas emotions (along with sensations and actions) are innate. I trace these beliefs to two tacit psychological principles: intuitive dualism and essentialism. Essentialism guides tacit reasoning about biological inheritance and suggests that innate traits reside in the body; per intuitive dualism, however, the mind seems ethereal, distinct from the body. It thus follows that, in our intuitive psychology, concepts (which people falsely consider as disembodied) must be learned, whereas emotions, sensations, and emotions (which are considered embodied) are likely innate; these predictions are in line with the experimental results. These conclusions do not speak to the question of whether concepts and emotions are innate, but they suggest caution in its scientific evaluation.

A Descriptive Diagnosis or a Causal Explanation? Accuracy of Depictions of Depression on Authoritative Health Organization Websites.

INTRODUCTION: Psychiatric diagnoses are descriptive in nature, but the lay public commonly misconceives them as causal explanations. It is not known whether this logical error, a form of circular reasoning, can sometimes be mistakenly reinforced by health authorities themselves. In this study, we investigated the prevalence of misleading causal descriptions of depression in the information provided by authoritative mental health organizations on widely accessed internet sites. METHODS: We searched for popular websites managed by leading mental health organizations and conducted a content analysis to evaluate whether they presented depression accurately as a description of symptoms, or inaccurately as a causal explanation. RESULTS: Most websites used language that inaccurately described depression as a causal explanation to depressive symptoms. CONCLUSION: Leading professional medical and psychiatric organizations commonly confound depression, a descriptive diagnostic label, with a causal explanation on their most prominently accessed informational websites. We argue that the scientifically inaccurate causal language in depictions of psychiatric diagnoses is potentially harmful because it leads the public to misunderstand the nature of mental health problems. Mental health authorities providing psychoeducation should clearly state that psychiatric diagnoses are purely descriptive to avoid misleading the public.

The effects of a defendant's childhood physical abuse on lay support for sentencing: The moderating role of essentialism.

Research suggests that a defendant's history of experiencing childhood abuse, and its effects on their life and later decision-making, may impact public support for a defendant's sentencing, particularly mitigation. However, no existing research has examined how and why sentencing support may vary based on the time period when the abuse occurs during a defendant's childhood. This experiment, using a sample of the U.S. public (N = 400), examines how the age at which a defendant's childhood physical abuse occurs affects lay support for the goals of their sentencing. We hypothesized that participants with higher levels of social and biological trait essentialism would moderate their increased support for more punitive sentencing goals-particularly when a defendant was abused earlier, rather than later, in childhood. Results suggest that social essentialism is associated with increased support for restoration and rehabilitation toward defendants with histories of childhood physical abuse, potentially indicating that the public views the effects of child abuse as more of a social, versus biological, process which may affect support for utilitarian punishment goals.

Food essentialism: Implications for expectations and perceptions of the properties of processed foods.

Despite the impact of processed foods on health, sustainability, and food security, consumers vary greatly in expectations about and preferences for processed foods. Essentialism is the lay belief that items in a category share a fundamental and immutable essence that generates the category's defining characteristics. Although essentialism may be an important determinant of consumers' cognitions about processed foods, there has been limited investigation of essentialism's role in food-related perceptions. Across two studies (n=598 total), we used a novel measure of food essentialism to examine whether individual differences in beliefs about foods as having essences (food essentialism) are related to perceptions of foods retaining more of their natural characteristics (sensory and nutritive properties) despite their level of processing. Across diverse food categories (meats, vegetables, fruits, legumes, dairy), higher levels of perceived food processing were associated with lower perceived retention of naturalness, nutritiousness, natural taste, functional post-ingestive benefits, and acceptability (liking). However, participants endorsing greater (vs. lower) food essentialism beliefs exhibited weaker relationships between perceived processing and these characteristics. We also observed variations across food categories in relationships between perceived level of processing and food properties, suggesting that some foods (i.e., milk-based products) are perceived to possess essences that are more robust despite undergoing higher levels of processing. These findings demonstrate that food-specific essentialism beliefs may be a fundamental determinant of consumers' expectations of how human intervention, such as processing, affects natural properties of foods. These beliefs may be a promising target for future research to shift consumer acceptance of processed foods.

A critique of motivation constructs to explain higher-order behavior: We should unpack the black box.

The constructs of motivation (or needs, motives, etc.) to explain higher-order behavior have burgeoned in psychology. In this article, we critically evaluate such high-level motivation constructs that many researchers define as causal determinants of behavior. We identify a fundamental issue with this predominant view of motivation, which we called the black-box problem. Specifically, high-level motivation constructs have been considered as causally instigating a wide range of higher-order behavior, but this does not explain what they actually are or how behavioral tendencies are generated. The black box problem inevitably makes the construct ill-defined and jeopardizes its theoretical status. To address the problem, we discuss the importance of mental computational processes underlying motivated behavior. Critically, from this perspective, motivation is not a unitary construct that causes a wide range of higher-order behavior --- it is an emergent property that people construe through the regularities of subjective experiences and behavior. The proposed perspective opens new avenues for future theoretical development, i.e., the examination of how motivated behavior is realized through mental computational processes.

Attitudes to End-of-Life Care and Voluntary Assisted Dying Amongst Members of the Australian Jewish community.

The implementation of voluntary assisted dying (VAD) in the Australian State of Victoria in 2019 has stimulated discussions about end-of-life care and dying in many communities. Various attempts have been made to represent the attitudes of the Jewish community, a distinct culturally and linguistically diverse (CALD) group, in terms that suggest a unified set of opinions that opposes VAD policies. This research aimed to explore attitudes to VAD in the context of end-of-life care held by members of the Victorian Jewish community. A descriptive qualitative methodological design was employed. Ten Victorians who identify as Jewish were recruited and participated in in-depth, semi-structured interviews. Reflexive thematic analysis was carried out on the transcripts to identify key themes, attitudes and preferences in relation to end-of-life care, death and dying, and VAD. Three themes were identified: "complexity and variation", "similarities", and "factors influencing attitudes to VAD and end-of-life care". A significant degree of diversity was apparent, ranging from highly supportive of VAD to advocacy for a total repeal of the policy. The results indicate that images of how Victorian Jewish individuals feel towards VAD based on essentialised notions about the community and belief systems are not supported by the evidence. In reality, considerable diversity of attitudes exists towards VAD and end-of-life care. We conclude that it is important that policymakers and members of the broader society avoid stereotypes that falsely characterise this specific community and, by implication, other CALD groups, particularly in terms that ignore internal diversity regarding belief systems, social attitudes and ethical perspectives.

Knowledge and beliefs about epilepsy genetics among Hispanic and non-Hispanic patients.

OBJECTIVE: Hispanics continue to face challenges when trying to access health care, including epilepsy care and genetic-related health care services. This study examined epilepsy genetic knowledge and beliefs in this historically underserved population. METHODS: Questionnaires were completed by 641 adults with epilepsy without identified cause, of whom 122 self-identified as Hispanic or Latino and 519 as non-Hispanic. Participants were asked about their views on the contribution of genetics to the cause of their epilepsy ("genetic attribution"), optimism for advancements in epilepsy genetic research ("genetic optimism"), basic genetic knowledge, and epilepsy-specific genetic knowledge. Generalized linear models were used to compare the two groups in the means of quantitative measures and percents answered correctly for individual genetic knowledge items. Analyses were adjusted for age, sex, education, religion, family history of epilepsy, and time since last seizure. RESULTS: Hispanics did not differ from non-Hispanics in genetic attribution, genetic optimism, or number of six basic genetic knowledge items answered correctly. The number of nine epilepsy-specific genetic knowledge items answered correctly was significantly lower for Hispanics than non-Hispanics (adjusted mean = 6.0 vs. 6.7, p < .001). After adjustment for education and other potential mediators, the proportion answered correctly was significantly lower for Hispanics than non-Hispanics for only two items related to family history and penetrance of epilepsy-related genes. Only 54% of Hispanics and 61% of non-Hispanics answered correctly that "If a person has epilepsy, his or her relatives have an increased chance of getting epilepsy." SIGNIFICANCE: Despite large differences in sociodemographic variables including education, most attitudes and beliefs about genetics were similar in Hispanics and non-Hispanics. Epilepsy-specific genetic knowledge was lower among Hispanics than non-Hispanics, and this difference was mostly mediated by differences in demographic variables. Genetic counseling should address key concepts related to epilepsy genetics to ensure they are well understood by both Hispanic and non-Hispanic patients.

Where does language come from? The development of a naïve biological understanding of language.

We examined 3- to 10-year-old U.S. children's naïve biological beliefs about spoken language, probing developing beliefs about where language is located in the body. Experiment 1 (N = 128) introduced children to two aliens, each having eight parts: internal organs (brain and lungs), face parts (mouth and ears), limbs (arms and legs), and accessories (bag and hat). Participants were assigned to the Language condition (in which the aliens spoke two different languages) or the control Sports condition (in which the aliens played two different sports). We assessed children's reasoning about which parts were necessary to speak a language (or play a sport) by asking children to (a) create a new alien with the ability to speak a language (or play a sport) and (b) remove parts of an alien while preserving its ability to speak a language (or play a sport). In the Language condition, with age, children attributed language-speaking abilities to internal organs and face parts. In Experiment 2 (N = 32), a simplified language task revealed that 3- and 4-year-old children demonstrated a weaker, albeit present, biological belief about language. In Experiment 3 (N = 96), children decided at what point an alien would lose its ability to speak the language as the experimenter added or removed parts. Children attributed language-speaking abilities to specific internal organs and face parts (brain and mouth). We demonstrate that children believe that language is contained to specific parts of the body and that this "metabiological" reasoning increases with age.

Social essentialism in the United States and China: How social and cognitive factors predict within- and cross-cultural variation in essentialist thinking.

People intuitively view some social groups (such as Black people, Muslims, and women) as having biological underpinnings and discrete boundaries. Essentialist beliefs about social groups shape how people view themselves and others, leading to a number of negative social consequences. Whereas previous research has demonstrated variations in social essentialism within some Western societies, less is known about how social essentialism manifests in East Asian cultures that have well-documented differences in social values and cognitive styles from Western cultures. The current research investigated cultural variations in social essentialist thinking in the United States and China to reveal how cultural ideologies and social belief systems shape people's basic representations of the social world. Analyses revealed several cultural and social correlates of social essentialism both between and within the cultures and demonstrated the mediating role of collectivistic values in predicting cultural differences in essentialist beliefs about group coherence.

The undue influence of genetic information on senior medical students' treatment decisions.

BACKGROUND: Knowledge of the genetic basis of health conditions can influence how the public perceives their own and others' health. When there are known genetic associations for such conditions, genetic essentialist biases facilitate deterministic thinking and an over-emphasis of genetic causality. This study investigates the role that genetic essentialist biases play in medical decision-making. METHODS: Senior postgraduate medical students (N = 102) read a scenario in which a patient presents with gastroenterological symptoms. Half of the students were told that the patient tested positive for HLADQ2 - a gene implicated in, but not deterministic of, coeliac disease. The other half received no genetic information. Students were assessed on their recommendations for investigation and management using a multiple-choice questionnaire. Twenty-two of these students participated in a qualitative follow-up which used focus groups and semi-structured interviews to explore the reasoning behind students' responses. RESULTS: Management recommendations differed between the two groups, with those receiving genetic information more likely to recommend a gluten free diet. Recommendations for further investigation did not differ significantly between groups. Interviews suggested that these findings arose despite the students' good understanding of the common non-deterministic nature of genes, such as HLADQ2. CONCLUSION: Differences in management recommendations suggest that the inclusion of genetic information unduly biased students towards a premature diagnosis of a serious health condition, coeliac disease. Follow-up interviews introduced the possibility that observed manipulation-based differences may have been based on anticipated expectations of examiners, rather than perceived future clinical practice. Based on the present results it is unclear whether intentional exam-taking strategies fully account for medical students' decisions, or if they contribute in addition to the activation of genetic essentialist biases. Further research in clinical settings may ascertain whether genetic essentialist biases would truly influence medical student and doctors within their clinical practice environment.

Women Versus Females: Gender Essentialism in Everyday Language.

How do different words referring to gender/sex categories reflect and/or shape our understanding of gender/sex concepts? The current study examined this issue by assessing how individuals use gender/sex terms (females, males, women, men). Participants recruited through MTurk (N = 299) completed an online survey, rating the terms on nine dimensions, completing a fill-in-the-blank task, and reporting gender essentialist beliefs. Overall, participants rated the words females/males as more biological and technical, and women/men as higher on all other dimensions (e.g., appropriate, polite, warm). Preference for females/males correlated positively with gender essentialism among women. These findings suggest that use of certain gendered terms is linked to how people conceptualize gender/sex. Future research should further explore the relation between choice of gendered terms, how language choice reflects and shapes attitudes and beliefs about gender/sex, and factors (e.g., race) that may influence this relation.

The essentialism of early modern psychiatric nosology.

Are psychiatric disorders natural kinds? This question has received a lot of attention within present-day philosophy of psychiatry, where many authors debate the ontology and nature of mental disorders. Similarly, historians of psychiatry, dating back to Foucault, have debated whether psychiatric researchers conceived of mental disorders as natural kinds or not. However, historians of psychiatry have paid little to no attention to the influence of (a) theories within logic, and (b) theories within metaphysics on psychiatric accounts of proper method, and on accounts of the nature and classification of mental disorders. Historically, however, logic and metaphysics have extensively shaped methods and interpretations of classifications in the natural sciences. This paper corrects this lacuna in the history of psychiatry, and demonstrates that theories within logic and metaphysics, articulated by Christian Wolff (1679-1754), have significantly shaped the conception of medical method and (psychiatric) nosology of the influential nosologist Boissier De Sauvages (1706-1767). After treating Sauvages, I discuss the method of the influential nosologist William Cullen (1710-1790), and demonstrate the continuity between the classificatory methods of Sauvages and Cullen. I show that both Sauvages and Cullen were essentialists concerning medical diseases in general and psychiatric disorders in particular, contributing to the history of conceptions of the ontology and nature of mental disorders.

Irreducibly Social: Why Biocriminology's Ontoepistemology is Incompatible with the Social Reality of Crime.

Professing interactionist bio + social terminology, contemporary biocriminology asserts a break from its biologically essentialist past. Assurances notwithstanding, whether biocriminology has undergone a decisive paradigm shift rejecting notions of biological criminals and bad brains remains uncertain. Unfortunately, discussions of biocriminology's assumptions are mired in politics, obscuring important scientific issues. Motivated to clarify misunderstanding, I address the ontoepistemology of biocriminology from a scientific realist perspective. Drawing on familiar notions of crime as a social construction, I explain how and why biocriminology's ontoepistemology is inconsistent with the social reality of crime for scientific not ideological reasons. I explain that recognizing crime is a social construction does not imply that crime is not real or objective and cannot be studied scientifically. On the contrary, the irreducibly social nature of crime requires that scientific realists reject assumptions of 'biological crime' as well as the biologically reductionist epistemology on which biocriminology depends.

Genetic and Environmental Influences on Biological Essentialism, Heuristic Thinking, Need for Closure, and Conservative Values: Insights From a Survey and Twin Study.

Biological essentialism, the belief that human attributes are determined by biology, is a core component of essentialist thinking. Previous studies have shown that individual differences in essentialist thinking are associated with heuristic thinking, cognitive ability and style, conservative values, and prejudice. None, however, have examined whether biological essentialism is itself heritable, or the extent to which familial aggregation explains associations with core correlates. In order to do this, we analyzed data from a genetically informative sample of families with twins in Australia (N = 2,103), as well as general population samples from the UK (N = 501) and the US (N = 500). Genetic factors had little influence in individual differences in biological essentialism or in its relationship with heuristic thinking. Conservative values were genetically correlated with cognitive styles (i.e., need for closure and heuristic thinking). These findings support a bigger role of genes in explaining the relationship between cognitive processes and moral reasoning and ideology than they do the association between cognitive processes and essentialist thinking.