Jacob B. Hirsh

Testing Predictions From Personality Neuroscience Brain Structure and the Big Five

We used a new theory of the biological basis of the Big Five personality traits to generate hypotheses about the association of each trait with the volume of different brain regions. Controlling for age, sex, and whole-brain volume, results from structural magnetic resonance imaging of 116 healthy adults supported our hypotheses for four of the five traits: Extraversion, Neuroticism, Agreeableness, and Conscientiousness. Extraversion covaried with volume of medial orbitofrontal cortex, a brain region involved in processing reward information. Neuroticism covaried with volume of brain regions associated with threat, punishment, and negative affect. Agreeableness covaried with volume in regions that process information about the intentions and mental states of other individuals. Conscientiousness covaried with volume in lateral prefrontal cortex, a region involved in planning and the voluntary control of behavior. These findings support our biologically based, explanatory model of the Big Five and demonstrate the potential of personality neuroscience (i.e., the systematic study of individual differences in personality using neuroscience methods) as a discipline.

Compassionate Liberals and Polite Conservatives: Associations of Agreeableness With Political Ideology and Moral Values

Political conservatism has been characterized by resistance to change and acceptance of inequality, with liberalism characterized by the polar opposite of these values. Political attitudes are heritable and may be influenced by basic personality traits. In previous research, conservatism (vs. liberalism) has been associated positively with Conscientiousness and negatively with Openness-Intellect, consistent with the association of conservatism with resistance to change. Less clear, however, are the personality traits relating to egalitarianism. In two studies, using a personality model that divides each of the Big Five into two aspects, the present research found that one aspect of Agreeableness (Compassion) was associated with liberalism and egalitarianism, whereas the other (Politeness) was associated with conservatism and traditionalism. In addition, conservatism and moral traditionalism were positively associated with the Orderliness aspect of Conscientiousness and negatively with Openness-Intellect. These findings contribute to a more nuanced understanding of personality’s relation to political attitudes and values.

Neural Markers of Religious Conviction

Many people derive peace of mind and purpose in life from their belief in God. For others, however, religion provides unsatisfying answers. Are there brain differences between believers and nonbelievers? Here we show that religious conviction is marked by reduced reactivity in the anterior cingulate cortex (ACC), a cortical system that is involved in the experience of anxiety and is important for self-regulation. In two studies, we recorded electroencephalographic neural reactivity in the ACC as participants completed a Stroop task. Results showed that stronger religious zeal and greater belief in God were associated with less firing of the ACC in response to error and with commission of fewer errors. These correlations remained strong even after we controlled for personality and cognitive ability. These results suggest that religious conviction provides a framework for understanding and acting within ones environment, thereby acting as a buffer against anxiety and minimizing the experience of error.

Psychological Entropy: A Framework for Understanding Uncertainty-Related Anxiety

Entropy, a concept derived from thermodynamics and information theory, describes the amount of uncertainty and disorder within a system. Self-organizing systems engage in a continual dialogue with the environment and must adapt themselves to changing circumstances to keep internal entropy at a manageable level. We propose the entropy model of uncertainty (EMU), an integrative theoretical framework that applies the idea of entropy to the human information system to understand uncertainty-related anxiety. Four major tenets of EMU are proposed: (a) Uncertainty poses a critical adaptive challenge for any organism, so individuals are motivated to keep it at a manageable level; (b) uncertainty emerges as a function of the conflict between competing perceptual and behavioral affordances; (c) adopting clear goals and belief structures helps to constrain the experience of uncertainty by reducing the spread of competing affordances; and (d) uncertainty is experienced subjectively as anxiety and is associated with activity in the anterior cingulate cortex and with heightened noradrenaline release. By placing the discussion of uncertainty management, a fundamental biological necessity, within the framework of information theory and self-organizing systems, our model helps to situate key psychological processes within a broader physical, conceptual, and evolutionary context.

The Devil You Know Neuroticism Predicts Neural Response to Uncertainty

Individuals differ in the extent to which they respond negatively to uncertainty. Although some individuals feel little discomfort when facing the unknown, those high in neuroticism find it aversive. We examined neurophysiological responses to uncertainty using an event-related potential framework. Participants completed a time-estimation task while their neural activity was recorded via electroencephalography. The feedbackrelated negativity (FRN), an evoked potential that peaks approximately 250 ms after the receipt of feedback information, was examined under conditions of positive, negative, and uncertain feedback. The magnitude of these responses was then analyzed in relation to individual differences in neuroticism. As expected, a larger FRN was observed after negative feedback than after positive feedback for all participants. For individuals who scored highly on trait neuroticism, however, uncertain feedback produced a larger neural response than did negative feedback. These results are discussed in terms of affective responses to uncertainty among neurotic individuals.

Emotional foundations of cognitive control

Often seen as the paragon of higher cognition, here we suggest that cognitive control is dependent on emotion. Rather than asking whether control is influenced by emotion, we ask whether control itself can be understood as an emotional process. Reviewing converging evidence from cybernetics, animal research, cognitive neuroscience, and social and personality psychology, we suggest that cognitive control is initiated when goal conflicts evoke phasic changes to emotional primitives that both focus attention on the presence of goal conflicts and energize conflict resolution to support goal-directed behavior. Critically, we propose that emotion is not an inert byproduct of conflict but is instrumental in recruiting control. Appreciating the emotional foundations of control leads to testable predictions that can spur future research.

Setting, Elaborating, and Reflecting on Personal Goals Improves Academic Performance

Of students who enroll in 4-year universities, 25% never finish. Precipitating causes of early departure include poor academic progress and lack of clear goals and motivation. In the present study, we investigated whether an intensive, online, written, goal-setting program for struggling students would have positive effects on academic achievement. Students (N = 85) experiencing academic difficulty were recruited to participate in a randomized, controlled intervention. Participants were randomly assigned to 1 of 2 intervention groups: Half completed the goal-setting program, and half completed a control task with intervention-quality face validity. After a 4-month period, students who completed the goal-setting intervention displayed significant improvements in academic performance compared with the control group. The goal-setting program thus appears to be a quick, effective, and inexpensive intervention for struggling undergraduate students.

Personalized Persuasion Tailoring Persuasive Appeals to Recipients’ Personality Traits

Persuasive messages are more effective when they are custom-tailored to reflect the interests and concerns of the intended audience. Much of the message-framing literature has focused on the advantages of using either gain or loss frames, depending on the motivational orientation of the target group. In the current study, we extended this research to examine whether a persuasive appeal’s effectiveness can be increased by aligning the message framing with the recipient’s personality profile. For a single product, we constructed five advertisements, each designed to target one of the five major trait domains of human personality. In a sample of 324 survey respondents, advertisements were evaluated more positively the more they cohered with participants’ dispositional motives. These results suggest that adapting persuasive messages to the personality traits of the target audience can be an effective way of increasing the messages’ impact, and highlight the potential value of personality-based communication strategies.

Drunk, Powerful, and in the Dark: How General Processes of Disinhibition Produce Both Prosocial and Antisocial Behavior

Social power, alcohol intoxication, and anonymity all have strong influences on human cognition and behavior. However, the social consequences of each of these conditions can be diverse, sometimes producing prosocial outcomes and other times enabling antisocial behavior. We present a general model of disinhibition to explain how these seemingly contradictory effects emerge from a single underlying mechanism: The decreased salience of competing response options prevents activation of the Behavioral Inhibition System (BIS). As a result, the most salient response in any given situation is expressed, regardless of whether it has prosocial or antisocial consequences. We review three distinct routes through which power, alcohol intoxication, and anonymity reduce the salience of competing response options, namely, through Behavioral Approach System (BAS) activation, cognitive depletion, and reduced social desirability concerns. We further discuss how these states can both reveal and shape the person. Overall, our approach allows for multiple domain-specific models to be unified within a common conceptual framework that explains how both situational and dispositional factors can influence the expression of disinhibited behavior, producing both prosocial and antisocial outcomes.

Openness to Experience and Intellect Differentially Predict Creative Achievement in the Arts and Sciences

The Big Five personality dimension Openness/Intellect is the trait most closely associated with creativity and creative achievement. Little is known, however, regarding the discriminant validity of its two aspects-Openness to Experience (reflecting cognitive engagement with perception, fantasy, aesthetics, and emotions) and Intellect (reflecting cognitive engagement with abstract and semantic information, primarily through reasoning)-in relation to creativity. In four demographically diverse samples totaling 1,035 participants, we investigated the independent predictive validity of Openness and Intellect by assessing the relations among cognitive ability, divergent thinking, personality, and creative achievement across the arts and sciences. We confirmed the hypothesis that whereas Openness predicts creative achievement in the arts, Intellect predicts creative achievement in the sciences. Inclusion of performance measures of general cognitive ability and divergent thinking indicated that the relation of Intellect to scientific creativity may be due at least in part to these abilities. Lastly, we found that Extraversion additionally predicted creative achievement in the arts, independently of Openness. Results are discussed in the context of dual-process theory.