title: Temporal predictability facilitates action, not perception.
abstract: Expectancy for upcoming action requirements is a fundamental prerequisite for human control of action. In the research reported here, we investigated which part of cognitive processing benefits from temporal predictability. In a binary forced-choice paradigm, visual targets were preceded by different intervals. In one condition, targets could be predicted by the length of the intervals. In other conditions, response goals or response effectors could be predicted by the length of the intervals. Behavioral advantages were observed when response effectors were temporally predictable, whereas temporal predictability of response goals and target stimuli was not sufficient. The findings thus show that temporal expectancy in speeded choice-reaction tasks facilitates late, effector-specific motor processing. These findings are of importance not only for our basic understanding of action control but also for any human-machine interaction that involves system delays.
authors.affiliation: Institute of Experimental Psychology, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany. roland.thomaschke@psychologie.uni-regensburg.de
authors.forename: Roland
authors.initials: R
authors.lastname: Thomaschke
authors.forename: Gesine
authors.initials: G
authors.lastname: Dreisbach
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology*; D002755:Choice Behavior; D005260:Female; D006801:Humans; D008297:Male; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time; D013998:Time Perception / Q000502:physiology*; D055815:Young Adult
keywords: attention; motor processes; temporal frequency; time estimation; time perception