Auditory Pattern Memory
Annual rept. 1 Oct 1988-31 Oct 1989
FLORIDA UNIV GAINESVILLE DEPT OF PSYCHOLOGY
Pagination or Media Count:
A series of experiments testing the discrimination of random temporal patterns single frequency tone sequences was performed. The observers task was to discriminate whether two sequences of tones contained the same or different patterns of temporal gaps. Half of the experimental trials contained gap sequences that were perfectly correlated across the two sequences e.g. the temporal patterns were identical, and half the trials contained gap sequences that were partially correlated the correlation was controlled by adding the outputs of two normal deviate generators. A model of discrimination, based on computation of the sample correlation between the gaps, and limited by a fixed source of internal independent temporal noise, allowed good prediction of observer performance. Some additional sources of variance were due to encoding or memory limitations. The correlation model makes specific predictions about the consequences of sequence time compression and expansion on performance experiments are under way to evaluate the effects of these transformations. Keywords Auditory perception Auditory sequence discrimination Temporal pattern perception.
- Anatomy and Physiology