人格差异性的进化心理学解释

进化心理学一直热衷于人格共同性的探讨,但一些研究者也认为应该关注人格差异性,因为共同性和差异性是人格必不可分的两面。对人格差异性的进化解释比较成熟的有三种：生活历史理论、基因多样性理论和代价信号理论。生活历史理论认为是不同的环境(稳定和不稳定),造成了不同的生活历史策略(K策略和R策略),人格特质差异是这些策略的进化产物。基因多样性理论主要从基因突变和平衡选择的角度来解释人格差异性。前者强调突变基因的不可避免性引发了个性差异的存在和发展;后者强调概率的调节作用,解释了不同人格特质之所以能够并行存在的原因。代价信号理论则认为是个体拥有的先天禀赋或者资源差距导致其传递信号的能力差异,从而选择了不同的行为策略。未来研究需要加大遗传学、神经科学等方面的力度,以及研究范式的创新。     

The Openness-calibration hypothesis

The current study tested the hypotheses that (1) psychological adaptations calibrate Openness to Experience to facilitate or deter pursuit of short-term mating, and (2) this calibration varies as a function of mating strategy, physical attractiveness, and sex—individual differences that shift the costs and benefits of alternative personality strategies. Participants completed a personality inventory before and after reading vignettes describing mating opportunities of different durations (short- and long-term) with individuals of differing levels of attractiveness. Among study findings, participants presented with short-term mating opportunities with individuals of average attractiveness exhibited down-regulated Openness relative to those presented with highly attractive mates. Moreover, these effects varied as a function of the interaction between participants’ sex, mating strategy, and attractiveness. These findings are consistent with the hypothesis that evolved psychological mechanisms adaptively calibrate Openness levels in response to short-term mating opportunities. More broadly, they highlight the heuristic value of an evolutionary framework for the study of personality and individual differences.     

Testing an Adaptationist Theory of Trait Covariation: Relative Bargaining Power as a Common Calibrator of an Interpersonal Syndrome

This article provides the first test of an adaptationist ‘common calibration’ theory to explain the origins of trait covariation, which holds that (i) personality traits are often facultatively calibrated in response to cues that ancestrally predicted the reproductive payoffs of different trait levels and (ii) distinct traits that are calibrated on the basis of common input cues will exhibit consistent patterns of covariation. This theory is applied to explain the covariation within a ‘personality syndrome’ encompassing various interpersonal trait dimensions (e.g. extraversion, emotionality and attachment styles). Specifically, it is hypothesized that these traits are inter‐correlated because each is calibrated in response to relative bargaining power (RBP)—a joint function of one's ability to benefit others and harm others. Path analyses from a correlational study compellingly supported this theoretical model: Objective and self‐perceived measures of RBP‐enhancing phenotypic features (physical attractiveness and physical strength) influenced an internal regulatory variable indexing RBP (i.e. self‐perceived RBP), which in turn had robust effects on each of the focal personality traits. Moreover, in support of the theory's core postulate, controlling for self‐perceived RBP greatly reduced the covariation within the interpersonal syndrome. These novel findings illustrate the promise of an evolutionary psychological approach to elucidating trait covariation. Copyright © 2013 John Wiley & Sons, Ltd.     

Lean on me: The importance of one's own and partner's intercultural personality for expatriate's and expatriate spouse's successful adjustment abroad

This research explores the role of three intercultural personality traits—emotional stability, social initiative, and open-mindedness—as coping resources for expatriate couples’ adjustment. First, we examined the direct relationships of expatriates’ and expatriate spouses’ personality trait levels with psychological and sociocultural adjustment. Psychological adjustment refers to internal psychological outcomes such as mental health and personal satisfaction, whereas sociocultural adjustment refers to more externally oriented psychological outcomes that link the individual to the new environment. Second, we examined the association of expatriates’ personality trait levels with professional adjustment, which was defined in terms of job performance and organizational commitment. Cross-sectional analyses among 196 expatriates and expatriate spouses (i.e., 98 expatriate couples) revealed that the three dimensions are each associated with specific facets of adjustment. A longitudinal analysis among a subsample (45 couples) partially confirmed these findings. Furthermore, we obtained evidence for a resource compensation effect, that is, the compensatory process whereby one partner's lack of sufficiently high levels of a certain personality trait is compensated for by the other partner's high(er) levels of this traits. Through this resource compensation effect, the negative consequences of a lack of sufficient levels of a personality trait on adjustment can be diminished. Apparently, in the absence of sufficiently high trait levels, individuals can benefit from personality resources in their partners.     

Connecting DSM-5 Personality Traits and Pathological Beliefs: Toward a Unifying Model

Dissatisfaction with the DSM-IV model of personality disorders has led to the development of alternative conceptualizations, including pathological trait models and models linked to particular theoretical approaches, such as Beck and Freeman’s (1990) cognitive framework. An important issue involves the potential to interweave such models into a single, parsimonious system that combines their distinct advantages. In this study, pathological trait and dysfunctional belief data from 616 individuals in a non-clinical sample were evaluated for commensurability using structural equation modeling. These models can be integrated via five higher-order factors, and that specific dimensions of dysfunctional beliefs can be differentiated based on features of the DSM-5 trait model. Overall, these results suggest that traits provide scaffolding for individual differences in pathological personality, within which dysfunctional beliefs offer specific vectors for clinical intervention in a cognitive framework. Implications of the empirical commensurability of trait and cognitive models are discussed.     

Cybernetic Big Five Theory

Cybernetics, the study of goal-directed, adaptive systems, is the best framework for an integrative theory of personality. Cybernetic Big Five Theory attempts to provide a comprehensive, synthetic, and mechanistic explanatory model. Constructs that describe psychological individual differences are divided into personality traits, reflecting variation in the parameters of evolved cybernetic mechanisms, and characteristic adaptations, representing goals, interpretations, and strategies defined in relation to an individual’s particular life circumstances. The theory identifies mechanisms in which variation is responsible for traits in the top three levels of a hierarchical trait taxonomy based on the Big Five and describes the causal dynamics between traits and characteristic adaptations. Lastly, the theory links function and dysfunction in traits and characteristic adaptations to psychopathology and well-being.     

Where birds flock to get together: The who,what, where,and why of mate searching

An understudied area of personality psychology is how personality traits might facilitate structuring of one’s environment toward goals like mating. In four studies (N = 1325), we examined (1) self-reports of where individuals go to find long-term and short-term mates, (2) how personality traits are associated with the use of these locations, and (3) how the sexes differ in their selection of mate search locations. Men were more likely than women were to use short-term (e.g., bars) than long-term (e.g., community events) niches, but did not differ in success in those niches and agreed on the nature of those niches. Slow life history traits, conscientiousness and agreeableness, were linked to preferences for long-term niches whereas, fast life history traits, narcissism and dishonesty, were linked to preferences for short-term mating niches.     

Exploitative male mating strategies: Personality, mating orientation, and relationship status

Previous research suggests men are sexually attracted to women displaying cues to sexual exploitability. During human evolutionary history, men’s agreeableness, orientation towards casual sex, and relationship status may have been recurrently associated with greater net benefits of pursuing a sexually exploitative strategy. We hypothesized these three individual differences would predict men’s perceptions of women’s sexual exploitability. Seventy-two men viewed photographs of women and rated their sexual exploitability. Men’s agreeableness, sociosexual orientation, and current relationship status interacted to predict their perceptions of women’s sexual exploitability; among unmated men, the combination of low agreeableness and an orientation toward uncommitted sex was associated with higher perceptions of women’s sexual exploitability. This suggests mechanisms motivating sexually exploitative strategies may depend on an interaction between personality characteristics and situational variables.     

UNTANGLING FALSE ASSUMPTIONS REGARDING ATHEISM AND HEALTH

Abstract In the past decade, the cognitive science of religion has worked to find an evolutionary explanation for supernatural belief. The explanations are convincing, but have created the stereotype that atheism is unnatural. In a similar way studies linking religious belief and health have vilified atheism as unhealthy. But belief is too complex, health is too nuanced, and the data are too varied to draw such a generalization. Catherine Caldwell‐Harris has developed a psychological profile to understand nonbelief as an expected outcome of individual difference and therefore natural. In a similar manner I argue that we should study the relationship between belief and health through the lens of individual differences. This approach is especially promising given recent research which indicates personality fully accounts for the relationship with well‐being previously attributed to belief. This approach has the added benefit of neutralizing the conversation by understanding atheism as the healthy expression of a natural personality.     

A primer on the Dark Triad traits

In this review, we detail three personality traits (i.e., narcissism, psychopathy, and Machiavellianism) that have gained popularity in the last decade as the ‘Dark Triad’. These traits are useful to augment research on personality, like the Big Five traits, as they capture individual differences in ‘darker’ aspects of personality more fully. We briefly review the body of work surrounding these traits, how they are measured, how they can be understood through the exploration of their nomological network, and the role each trait plays in various domains like organisational psychology and interpersonal relationships. We then detail how an evolutionary paradigm can provide a novel and powerful way of understanding these traits. Finally, we explore broad-spectrum concerns about the research and thoughts on how one might think about these issues.     

All smiles perceived equally: Facial expressions trump target characteristics in impression formation

Race, gender, and emotionally expressive facial behavior have been associated with trait inferences in past research. However, it is unclear how interactions among these factors influence trait perceptions. In the current research, we test the roles of targets’ race, gender, and facial expression along with participants’ culture in predicting personality ratings. Caucasian and Asian-American participants rated the big-5 personality traits of either smiling or inexpressive photographs of Caucasian and Asian male and female faces. Ratings of extraversion, agreeableness, and conscientiousness differed significantly across inexpressive targets as a function of race and gender categorization and individual characteristics. Smiling was associated with reduced variation in perceptions of targets’ extraversion and agreeableness relative to ratings made of inexpressive targets. In addition, participant culture generally did not significantly impact trait ratings. Results suggest that emotionally expressive facial behavior reduces the use of information based on race or gender in forming impressions of interpersonally relevant traits.     

Deriving an empirical structure of personality pathology for DSM-5

The DSM-IV model of personality disorders is composed of trait sets arranged into 10 theoretically distinct, polythetically assessed categories, with little regard for how the traits comprising these disorders are interrelated and structured. Research since the publication of DSM-III has shown that this model is untenable. The question is not whether this model needs revision; rather, the question is how to move from the existing DSM-IV framework to a model better connected with data. Empirically-based models of personality trait variation provide a starting point for DSM-5, and ongoing research will be used to delineate further the empirical structure of personality traits in the pathological range. The ultimate goal is to frame future DSMs in a way that is maximally useful for clinicians as well as researchers. It is also critical to understand that the DSM-5 is intended to be a living document that will facilitate novel inquiry and clinical applications, as opposed to a document designed to promote and perpetuate a fixed set of constructs. Thus, we view a proposed trait system as a first step on a path to a well-validated, clinically-useful structure.     

Functional coordination of personality strategies with physical strength and attractiveness: A multi-sample investigation at the HEXACO facet-level

Previous research has supported adaptationist hypotheses pertaining to the functional coordination of personality strategies with phenotypic determinants of bargaining power, such as physical strength and attractiveness. However, prior studies have focused primarily on explaining variation in Extraversion and Emotionality/Neuroticism as broadband traits. The current study synthesizes data from three subject samples (N = 766) to test correlations of physical strength and attractiveness with the HEXACO factors and facets among young adults. Our analyses reveal specific, functionally meaningful, patterns of phenotypic coordination, and thereby help illuminate which facets drive previously documented associations at the factor-level. Among both sexes, strength was an especially important predictor of facets whose secondary loadings place them in the quadrant of factor space defined by high Extraversion (Expressiveness, Liveliness, Social Boldness) and low Emotionality (Fearfulness, Anxiety). Findings bolster the hypothesis that specific personality strategies are coordinated with phenotypic components of bargaining power, and suggest that granular measures of personality (such as facets) may provide more mechanistic and functional insight than broadband trait factors.     

Is variability in mate choice similar for intelligence and personality traits? Testing a hypothesis about the evolutionary genetics of personality

This study tests the hypothesis presented by Penke, Denissen, and Miller (2007a) that condition-dependent traits, including intelligence, attractiveness, and health, are universally and uniformly preferred as characteristics in a mate relative to traits that are less indicative of condition, including personality traits. We analyzed between-culture mean standard deviations of preference ratings and rankings provided by nearly 10,000 people in 37 cultures for 18 characteristics in a potential mate. Contrary to the hypothesis, preferences for traits indicating agreeableness and conscientiousness were not more variable than preferences for intelligence, and preferences for traits indicating low neuroticism were more uniform than preferences for intelligence. Discussion addresses implications of these results for hypotheses about the evolutionary genetics of intelligence and personality.     

Individual differences in preschool children: temperament or personality?

Individual differences among adults have generally been conceptualized in terms of personality theory and traits. In contrast, individual differences among very young children (birth to kindergarten) have generally been conceptualized in terms of temperament theory and traits. The present study compares and contrasts measures of temperament and personality in a sample of preschool children. Temperament traits were assessed with a well‐established measure (the Rothbart CBQ), and a new preschool rating instrument was used to assess personality traits from the five‐factor framework (M5‐PS). Indeed, a key purpose of this study was to further the development of the M5‐PS. Data were gathered on 122 preschool children who were rated by their teachers. Significant correlations were found between the temperament trait Surgency and the personality trait Extraversion, between the temperament trait Negative Affect and the personality trait Neuroticism, and between the temperament trait Effortful Control and the personality trait Conscientiousness. The overall pattern of correlational data suggests that individual differences in preschool children can be adequately described using the five‐factor theory, and that this framework may effectively subsume traditional theories of temperament. Preliminary support for the reliability and validity of the M5‐PS is offered. Copyright © 2010 John Wiley & Sons, Ltd.     

Beyond Traits in the Study of Personality Coherence

People exhibit coherent patterns of experience and action that cannot be fully described or explained by personality trait models. Rather, personality coherence is expressed in dispositional tendencies that violate the structure of common trait categories. Across contexts, people display predictable patterns of behavioral variation that cannot be captured by trait constructs, which correspond to mean levels of response. In addition to these empirical findings, theoretical work in both psychology and philosophy challenges the conceptual strategies through which trait models explain personality coherence. These empirical and theoretical points can be addressed by alternative theoretical models that specify how underlying psychological systems give rise to both common and idiosyncratic patterns of personality consistency and variability.     

Candidate Evaluations Through the Lens of Adaptive Followership Psychology: How and Why Voters Prefer Leaders Based on Character Traits

An extensive literature in political science shows how citizens' evaluations of politicians—as well as their electoral behavior—are affected by trait impressions of these politicians. However, deeper, interdisciplinary theory building that seeks to address when and for whom specific trait impressions come to guide candidate evaluations remains absent. In this article, I outline the theory of adaptive followership that seeks to address this shortcoming. Grounded in evolutionary psychology, I argue that leadership evolved as a solution to problems of intragroup coordination in ancestral small-scale societies. In order to understand the traits that drive followers' and voters' evaluations of leaders and politicians, one should therefore focus on problems related to group coordination and ask how these problems might regulate followers' prioritizations of various traits in leaders. On this basis, I outline an analytical framework consisting of three predictions that simultaneously formulate how (1) contexts and (2) individual differences of relevance to a given group-coordination problem regulate trait preferences, and (3) how such preferences differ between leaders and nonleaders (i.e., other social categories). The analytical framework is applied for structuring two reviews (including new empirical studies) of the ways through which intergroup conflict and disease threat, respectively, affect followers' trait preferences in leaders. Finally, directions and suggestions for future research on trait-based candidates and leader evaluations are discussed.