A threshold-free model of numerosity comparisons.

ABSTRACT: A dominant mechanism in the Judgment and Decision Making literature states that information is accumulated about each choice option until a decision threshold is met. Only after that threshold does a subject start to execute a motor response to indicate their choice. However, recent research has revealed spatial gradients in motor responses as a function of comparison difficulty as well as changes-of-mind in the middle of an action, both suggesting continued accumulation and processing of decision-related signals after the decision boundary. Here we present a formal model and supporting data from a number comparison task that a continuous motor planner, combined with a simple statistical inference scheme, can model detailed behavioral effects without assuming a threshold. This threshold-fr

SUBMITTER: Alonso-Diaz S 

PROVIDER: S-EPMC5886529 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature