title: Effect of information feedback on temporal discrimination in concurrent and post-feedback measures.
abstract: College students estimated time intervals (5, 6, 7, 8, and 9 sec.) where one group (N = 20) received information feedback in terms of actual interval durations and a second group (N = 18) received no information. Theshold measures were then taken for all subjects using the method of constant stimuli (comparison stimuli of 5, 6, 7, 8, and 9 sec. and a 7-sec. standard). In addition to increased accuracy and consistency of judgments, the feedback group showed a decreasing Weber fraction during the estimation phase, while the Weber fraction for the no-feedback group increased. The feedback group retained only a slight advantage in subsequent threshold measures; group differences in difference thresholds and derived nonparametric estimates of d' were nonsignificant.
mesh_terms: D004056:Differential Threshold; D005246:Feedback; D005260:Female; D006801:Humans; D007721:Knowledge of Results, Psychological; D008297:Male; D013997:Time Factors; D013998:Time Perception