Norm-focused nudges influence pro-environmental choices and moderate post-choice emotional responses.

In this paper, we use choice architecture techniques to activate both social and personal norms, seeking to increase pro-environmental choices and to better understand the effect of such norm types on post-choice emotional responses. In four experiments, we make different social or personal norms salient by aligning choice environments with psychosocial mechanisms that activate different types of norms. We use different choice architecture techniques to change information, alter product sets, and generate the social consequences of choices.

An examination of the association between early initiation of substance use and interrelated multilevel risk and protective factors among adolescents.

One of the major goals of drug use prevention programs is to delay the age of onset of substance use. What is called early initiation, usually occurring in adolescents under the age of 15, is a salient predictor of Substance Use Disorders later in adulthood. The causes of early initiation are complex and multifaceted and this has led to the identification of a rich set of risk and protective factors that influence age of onset.

The complementary role of affect-based and cognitive heuristics to make decisions under conditions of ambivalence and complexity.

Little is known about the interplay between affective and cognitive processes of decision making within the bounded rationality perspective, in particular for the debate on adaptive decision making and strategy selection. This gap in the knowledge is particularly important as affect and deliberation may direct preferences in opposite directions. How do decision makers solve such dissonance? In this paper, we address this question by exploring the use of integral affect as a choice heuristic in comparison with and in conjunction to "take the best," and weighted addition of attributes (WADD).

Correction: Prosocial Behavior and Subjective Insecurity in Violent Contexts: Field Experiments.

[This corrects the article DOI: 10.1371/journal.pone.

Prosocial Behavior and Subjective Insecurity in Violent Contexts: Field Experiments.

Subjective insecurity is a key determinant of different forms of prosocial behavior. In Study 1, we used field experiments with farmers in Colombian villages exposed to different levels of violence to investigate how individual perceptions of insecurity affect cooperation, trust, reciprocity and altruism. To do so, we developed a cognitive-affective measure of subjective insecurity.