Duration estimates within a modality are integrated sub-optimally

Frontiers in Psychology

Ming Bo Cai¹ 

关键词: duration perception;    cue integration;    memory decay;    Bayesian inference;    temporal frequency;    time order error;    just noticeable difference;   

DOI  :  10.3389/fpsyg.2015.01041

学科分类：心理学（综合）

来源: Frontiers

【 摘 要 】

Perceived duration can be influenced by various properties of sensory stimuli. For example, visual stimuli of higher temporal frequency are perceived to last longer than those of lower temporal frequency. How does the brain form a representation of duration when each of two simultaneously presented stimuli influences perceived duration in different way? To answer this question, we investigated the perceived duration of a pair of dynamic visual stimuli of different temporal frequencies in comparison to that of a single visual stimulus of either low or high temporal frequency. We found that the duration representation of simultaneously occurring visual stimuli is best described by weighting the estimates of duration based on each individual stimulus. However, the weighting performance deviates from the prediction of statistically optimal integration. In addition, we provided a Bayesian account to explain a difference in the apparent sensitivity of the psychometric curves introduced by the order in which the two stimuli are displayed in a two-alternative forced-choice task.

【 授权许可】

CC BY