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Biomedical subjects

D J Bobko

Publications and source records attributed to D J Bobko.

4 recordsLinked to original sources
PubMed1977

The perception of brief temporal intervals: power functions for auditory and visual stimulus intervals.

Two experiments were performed to examine the role of method of estimation and the employment of a standard stimulus on the judged duration of auditory and visual stimuli presented for brief temporal intervals (0.25 to 5.0 s). The results indicate that the relationship between judged and physical duration is nearly direct and linear. Psychophysical methodology and stimulus modality exerted little influence on the obtained power functions.

Acoustic Stimulation↗
PubMed1977

Contextual effects in duration experience.

The role of contextual factors on duration estimates was investigated, employing 6 time intervals ranging from 15 to 35 sec (demarcated by the onset and termination of a display panel of lights). When compared with earlier research, the results suggest that duration estimates are affected by the context of the stimulus intervals with regard to other stimuli in the series. Specifically, those stimuli that were overestimated when they were the shortest members of the series were underestimated when they were the longest intervals of the stimulus series. In addition, a lengthening effect was observed: duration estimates increased over blocks of trials for all stimulus intervals.

Discrimination, Psychological↗
PubMed1977

The role of number and familiarity of stimuli in the perception of brief temporal intervals.

The influence of stimulus number and familiarity on judged duration were investigated. The stimuli were slides with different numbers of stimulus elements of a familiar or unfamiliar nature. The task was to reproduce the durations of the slides, each shown for four intervals: 5, 9, 13, and 17 sec. The results show that the number of stimulus elements presented within a given interval affected its perceived duration, although the familiarity of those elements (as defined herein) did not. Finally, the shorter intervals sampled here were overestimated and the longer intervals were underestimated, thereby supporting Vierordt's law.

Humans↗