Vicarious Rewards Modulate the Drift Rate of Evidence Accumulation From the Drift Diffusion Model.

ABSTRACT: Taking other people's interests into account is a fundamental ability allowing humans to maintain relationships. Yet, the mechanisms by which monetary incentives for close others influence perceptual decision-making processes remain elusive. Here, we compared perceptual decisions motivated by payoffs for oneself or a close relative. According to drift diffusion models (DDMs), perceptual decisions are made when sensory evidence accumulated over time - with a given drift rate - reaches one of the decision boundaries. We used these computational models to identify whether the drift rate of evidence accumulation or the decision boundary is affected by these two sources of motivation. Reaction times and sensitivity were modulated by three factors: the Difficulty (motion coherence of the moving

SUBMITTER: Bottemanne L 

PROVIDER: S-EPMC6614513 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature