TEMPORAL FACTORS INFLUENCING THE PIGEON'S SUCCESSIVE MATCHING‐TO‐SAMPLE PERFORMANCE: SAMPLE DURATION, INTERTRIAL INTERVAL, AND RETENTION INTERVAL1

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Abstract
A successive matching‐to‐sample procedure that entails the sequential presentation of sample and test stimuli and the monitoring of response rates in a go/no‐go discrimination of matching and nonmatching stimuli was studied as an alternative to the familiar delayed‐matching paradigm of animal short‐term memory. Three within‐subject experiments studied the effects of sample duration (1 to 12 seconds), intertriai interval (5 to 50 seconds), and retention interval (1 to 50 seconds) on the pigeon's successive‐matching performance. The results revealed that retention was (a) an increasing function of sample duration and intertrial interval, and (b) a decreasing function of retention interval. These results were in accord with those of more traditional short‐term memory paradigms, and reveal the suitability of the successive‐matching procedure for studying memory processes.

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