Action observation: the less-explored part of higher-order vision.

ABSTRACT: Little is presently known about action observation, an important perceptual component of high-level vision. To investigate this aspect of perception, we introduce a two-alternative forced-choice task for observed manipulative actions while varying duration or signal strength by noise injection. We show that accuracy and reaction time in this task can be modeled by a diffusion process for different pairs of action exemplars. Furthermore, discrimination of observed actions is largely viewpoint-independent, cannot be reduced to judgments about the basic components of action: shape and local motion, and requires a minimum duration of about 150-200 ms. These results confirm that action observation is a distinct high-level aspect of visual perception based on temporal integration of visual input

SUBMITTER: Platonov A 

PROVIDER: S-EPMC5114682 | biostudies-literature | 2016 Nov

REPOSITORIES: biostudies-literature