Tonic Activity Level in the Right Prefrontal Cortex Predicts Individuals' Risk Taking

ABSTRACT— Human risk taking is characterized by a large amount of individual heterogeneity. In this study, we applied resting-state electroencephalography, which captures stable individual differences in neural activity, before subjects performed a risk-taking task. Using a source-localization technique, we found that the baseline cortical activity in the right prefrontal cortex predicts individual risk-taking behavior. Individuals with higher baseline cortical activity in this brain area display more risk aversion than do other individuals. This finding demonstrates that neural characteristics that are stable over time can predict a highly complex behavior such as risk-taking behavior and furthermore suggests that hypoactivity in the right prefrontal cortex might serve as a dispositional indicator of lower regulatory abilities, which is expressed in greater risk-taking behavior.     

Intensity seeking and novelty seeking: Their relationship to adolescent risk behavior and occupational interests

The aim of this study was to test the hypothesis that individual differences in sensation seeking account for adolescents’ risk behavior and vocational interests. We relied on Arnett’s (1994) conceptualization of sensation seeking as involving a need for intensity and a need for novelty, neither of which includes the willingness to take risks. Self-report scales measuring intensity seeking, novelty seeking, impulsiveness, risk behavior and vocational interest were administered to 636 adolescents. New scales measuring intensity seeking (IS) and novelty seeking (NS) were used. Regression analyses showed that IS and to a lesser extent NS accounted for a small part of variance of risk behavior, independent of impulsiveness. IS and NS accounted for vocational interests. The discussion emphasizes the importance of disentangling sensation seeking as a trait from willingness to take risks when one intends to analyse the effect of the former on risk behavior.     

The emergence of a social representation of human rights via interpersonal communication: empirical evidence for the convergence of two theories

To test the common assumption that social representations originate in ordinary communication, ten 24-person groups of American college students exchanged messages for 2 1/2 weeks about six specific issues drawn from a 21-item questionnaire previously used by Clémence, Doise, & Lorenzi-Cioldi (1994) in a cross-cultural investigation on human rights. As expected, interpersonal communication led to increased spatial clustering (neighbors in social space became more similar) and enhanced correlations among these issues, leading to a more coherent factor structure of human rights conceptions. Clustering and correlation simultaneously illustrate the emergence of self-organization in social systems and are taken as evidence for the social origin of social representations. These findings show how Latané's Dynamic Social Impact Theory complements Moscovici's Social Representation Theory, providing a mechanism for understanding how and criteria for knowing when social representations arise from communication. © 1998 John Wiley & Sons, Ltd.     

Internality attribution and intergroup relations

In two studies, subjects filled out a questionnaire requiring them to choose between internal and external explanations of desirable or undesirable events. They were also asked to fill out the same questionnaire from another person's point of view, either a member of the ingroup or a member of the outgroup. The first study used students as subjects and the events were about student life. The second study used employees for subjects and the events were about the working world. As predicted on the basis of internality norm theory, internal explanations were generally found to be chosen more often when the respondent or imagined respondent was said to be a worthy person. The internality scores were the highest for oneself and for the ingroup member, regardless of the desirability of the events; they were the lowest for the outgroup member. These internality attribution effects do not seem to stem from the well-known ingroup-favouring attributions (ultimate attribution error). Hence, the internality norm construct, irrespective of event desirability, provides a new pathway for exploring the evaluative effects of intergroup relations. © 1998 John Wiley & Sons, Ltd.     

Abstract Thinking Increases Support for Affirmative Action

Sex Roles - Affirmative action is the proactive process of using resources to ensure that people are not discriminated against based on their group membership, such as gender or ethnicity. It is an...     

Priors and payoffs in confidence judgments

Attention, Perception, & Psychophysics - Priors and payoffs are known to affect perceptual decision-making, but little is understood about how they influence confidence judgments. For optimal...     

N. R. Hanson and von Uexküll: A Biosemiotic and Evolutionary Account of Theories

Journal for General Philosophy of Science - This paper proposes a biosemiotic conception of theories, as non-intentional organic theories, which is based on an analysis and comparison of...     

Sosa on the normativity of belief

Sosa takes epistemic normativity to be kind of performance normativity: a belief is correct because a believer sets a positive value to truth as an aim and performs aptly and adroitly. I object to this teleological picture that beliefs are not performances, and that epistemic reasons or beliefs cannot be balanced against practical reasons. Although the picture fits the nature of inquiry, it does not fit the normative nature of believing, which has to be conceived along distinct lines.