Journalartikel

Jahr der Veröffentlichung: 1998

Seiten: 1-12

Zeitschrift: Journal of Psychophysiology

Bandnummer: 12

Heftnummer: 1

ISSN: 0269-8803

eISSN: 2151-2124

Verlag: Hogrefe

Abstract: 
The effects of filled auditory intervals (tones), empty intervals (a silent duration marked by an onset and an offset click), and gaps (a brief: pause in a continuous tone) on auditory temporal processing were investigated in 24 subjects who participated in a psychophysical and cn electrophysiological experiment. In the psychophysical experiment, just noticeable differences were determined as an indicator of temporal discrimination performance. Electrophysiological recordings of auditory evoked brain activity were obtained From Cz, C3, and C4. Discrimination performance was significantly better with filled intervals than with empty intervals or gap stimuli, and with empty intervals than with gap stimuli. In the electrophysiological recordings, gaps often failed to elicit reliable N100 components in half of the subjects. Therefore, part of the statistical analyses were based on 12 subjects only. Filled intervals produced significantly larger amplitudes than empty intervals and gaps which did not differ significantly. (Component latencies were markedly shorter with filled intervals than with gap stimuli. In addition, correlations between discrimination performance and N100 amplitudes computed across stimulus conditions suggested that superior performance is accompanied by more pronounced N100 amplitudes. This, however, did not hold within stimulus conditions. As different stimulus characteristics were shown to affect both primary as well as temporal auditory processing, the effects observed at the electrophysiological and psychophysical levels appear to represent, at least in part, common neural mechanisms.

Harvard-Zitierstil: Rammsayer, T. and Skrandies, W. (1998) Stimulus characteristics and temporal information processing: Psychophysical and electrophysiological data, Journal of Psychophysiology, 12(1), pp. 1-12

APA-Zitierstil: Rammsayer, T., & Skrandies, W. (1998). Stimulus characteristics and temporal information processing: Psychophysical and electrophysiological data. Journal of Psychophysiology. 12(1), 1-12.