Fast but not intuitive, slow but not reflective: Decision conflict drives reaction times in social dilemmas.

When people have the chance to help others at a cost to themselves, are cooperative decisions driven by intuition or reflection? To answer this question, recent studies have tested the relationship between reaction times (RTs) and cooperation, reporting both positive and negative correlations. To reconcile this apparent contradiction, we argue that decision conflict (rather than the use of intuition vs. reflection) drives response times, leading to an inverted-U shaped relationship between RT and cooperation.

Bringing free will down to Earth: people's psychological concept of free will and its role in moral judgment.

Belief in free will is widespread, and this belief is supposed to undergird moral and legal judgment. Despite the importance of the free will concept, however, there remains widespread confusion regarding its definition and its connection to blame. We address this confusion by testing two prominent models of the folk concept of free will-a metaphysical model, in which free will involves a soul as an uncaused "first mover," and a psychological model, in which free will involves choice, alignment with desires, and lack of constraints.