title: Planning and executing simple movements: contributions of relative-time and overall-duration specification.
abstract: In 3 experiments, the authors used a precuing protocol to examine the nature and cost of programming and the subsequent reprogramming of a movement's relative time and overall duration. Initial programming followed a fixed-order specification; knowledge of the necessary relative time was required before information regarding overall duration could be used in a manner that expedited response planning. In the case of reprogramming, however, when a modification had to be made in either the relative time or overall duration of the anticipated and already-prepared response, performers chose to completely reprogram the entire response. Complete reprogramming occurred even when the performer had correctly prepared the higher order relative-time component and only had to modify the overall duration of the movement. The data indicate that organizing movement timing before movement initiation is accomplished in a fundamentally different manner depending on whether the movement is being initially compiled or modified.
authors.affiliation: Department of Health and Kinesiology, Texas A&M University, College Station, TX 77843-4483, USA. d-wright@tamu.edu
authors.forename: D L
authors.initials: DL
authors.lastname: Wright
authors.forename: C
authors.initials: C
authors.lastname: Black
authors.forename: J H
authors.initials: JH
authors.lastname: Park
authors.forename: C H
authors.initials: CH
authors.lastname: Shea
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007858:Learning / Q000502:physiology; D008297:Male; D008960:Models, Psychological; D009048:Motor Skills / Q000502:physiology*; D009068:Movement / Q000502:physiology*; D011214:Practice, Psychological; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time; D014163:Transfer, Psychology / Q000502:physiology*