title: Calibration and alignment are separable: evidence from prism adaptation.
abstract: In 2 prism adaptation experiments, the authors investigated the effects of limb starting position visibility (visible or not visible) and visual feedback availability (early or late in target pointing movements). Thirty-two students participated in Experiment 1 and 24 students participated in Experiment 2. Independent of visual feedback availability, constant error was larger and variable error was smaller for target pointing when limb starting position was visible during prism exposure. Independent of limb starting position visibility, aftereffects of prism exposure were determined by visual feedback availability. Those results support the hypothesis that calibration is determined by limb starting position visibility, whereas alignment is determined separately by visual feedback availability.
authors.affiliation: Illinois State University, Department of Psychology, Campus Box 4620, Normal, IL 61790-4620, USA. gredding@ilstu.edu
authors.forename: G M
authors.initials: GM
authors.lastname: Redding
authors.forename: B
authors.initials: B
authors.lastname: Wallace
mesh_terms: D000328:Adult; D001288:Attention; D001696:Biomechanical Phenomena; D005246:Feedback; D005260:Female; D005366:Figural Aftereffect; D006801:Humans; D007699:Kinesthesis; D008297:Male; D009949:Orientation; D010469:Perceptual Distortion; D011434:Proprioception; D011597:Psychomotor Performance; D011601:Psychophysics