Rapid target foraging with reach or gaze: The hand looks further ahead than the eye.

ABSTRACT: Real-world tasks typically consist of a series of target-directed actions and often require choices about which targets to act on and in what order. Such choice behavior can be assessed from an optimal foraging perspective whereby target selection is shaped by a balance between rewards and costs. Here we evaluated such decision-making in a rapid movement foraging task. On a given trial, participants were presented with 15 targets of varying size and value and were instructed to harvest as much reward as possible by either moving a handle to the targets (hand task) or by briefly fixating them (eye task). The short trial duration enabled participants to harvest about half the targets, ensuring that total reward was due to choice behavior. We developed a probabilistic model to predict target-

SUBMITTER: Diamond JS 

PROVIDER: S-EPMC5500014 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature