title: The movement speed-accuracy relation in space-time.
abstract: Two experiments investigated a new approach to decomposing the contributions of spatial and temporal constraints to an integrated single space-time performance score in the movement speed-accuracy relation of a line drawing task. The mean and variability of the space-time performance error score were lowest when the task space and time constraint contributions to the performance score were comparable (i.e., middle range of velocities). As the contribution of either space or time to the performance score became increasingly asymmetrical at lower and higher average velocities, the mean performance error score and its variability increased with a greater trade-off between spatial and temporal movement properties. The findings revealed a new U-shaped space-time speed-accuracy function for performance outcome in tasks that have both spatial and temporal demands. The traditional speed-accuracy functions for spatial error and temporal error considered independently map to this integrated space-time movement speed-accuracy function.
authors: Graduate Institute of Exercise and Sport Science, National Taiwan Normal University, 88 Ting Zhou Road, Section 4, Taipei 116, Taiwan. tuh11@psu.edu
authors: Tsung-Yu
authors: TY
authors: Hsieh
authors: Yeou-Teh
authors: YT
authors: Liu
authors: Gottfried
authors: G
authors: Mayer-Kress
authors: Karl M
authors: KM
authors: Newell
mesh_terms: D000328:Adult; D001288:Attention; D001696:Biomechanical Phenomena; D003196:Computer Graphics; D030141:Feedback, Psychological; D005260:Female; D006801:Humans; D008297:Male; D009949:Orientation; D010865:Pilot Projects; D011597:Psychomotor Performance; D011930:Reaction Time; D012815:Signal Processing, Computer-Assisted; D013028:Space Perception; D055815:Young Adult