Accession Number : AD0749442

Title :   Auditory Discrimination in the Chinchilla: I. Reaction Time.

Descriptive Note : Progress rept.,

Corporate Author : ARMY MEDICAL RESEARCH LAB FORT KNOX KY

Personal Author(s) : Luz,George A. ; Nugen,Robert D.

Report Date : 17 APR 1972

Pagination or Media Count : 13

Abstract : Four chinchillas were tested on a frequency discrimination task in a two-way shuttlebox. Tones were presented in dyads, each tone being .75 sec long with .75 sec between tones. A standard was presented once every 23 sec. The positive stimulus (signal for avoidable shock) was a change in the frequency of both tones, the first tone, or the second tone of the standard dyad. Response latencies varied as a function of the temporal position of the changed tone. Changing both tones did not result in better discrimination than changing the first. Responding to the standard and spontaneous responding declined as a function of trials within sessions. (Author)

Descriptors :   (*AUDITORY PERCEPTION, SOUND PITCH), RODENTS, SOUNDS(WATERWAYS), PERCEPTION, REACTION(PSYCHOLOGY), REFLEXES, PSYCHOPHYSICS, PSYCHOPHYSIOLOGY, EXPERIMENTAL DATA

Subject Categories : Psychology
      Stress Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE