Adaptation to hand-tapping affects sensory processing of numerosity directly: evidence from reaction times and confidence.

ABSTRACT: Like most perceptual attributes, the perception of numerosity is susceptible to adaptation, both to prolonged viewing of spatial arrays and to repeated motor actions such as hand-tapping. However, the possibility has been raised that adaptation may reflect response biases rather than modification of sensory processing. To disentangle these two possibilities, we studied visual and motor adaptation of numerosity perception while measuring confidence and reaction times. Both sensory and motor adaptation robustly distorted numerosity estimates, and these shifts in perceived numerosity were accompanied by similar shifts in confidence and reaction-time distributions. After adaptation, maximum uncertainty and slowest response-times occurred at the point of subjective (rather than physical) equali

SUBMITTER: Maldonado Moscoso PA 

PROVIDER: S-EPMC7287367 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature