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Effects of brief time delays on matching-to-sample abilities in capuchin monkeys (Sapajus spp.)

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journal contribution
posted on 14.01.2015, 12:57 by Valentina Truppa, Diego Antonio De Simone, Eva Piano Mortari, Carlo De Lillo
Traditionally, studies of delayed matching-to-sample (DMTS) tasks in nonhuman species have focused on the assessment of the limits of the retrieval of information stored in short- and long-term memory systems. However, it is still unclear if visual recognition in these tasks is affected by very brief delay intervals, which are typically used to study rapidly decaying types of visual memory. This study aimed at evaluating if tufted capuchin monkeys' ability to recognise visual stimuli in a DMTS task is affected by (i) the disappearance of the sample stimulus and (ii) the introduction of delay intervals (0.5, 1.0, 2.0 and 3.0s) between the disappearance of the sample and the presentation of the comparison stimuli. The results demonstrated that the simple disappearance of the sample and the introduction of a delay of 0.5s did not affect capuchins' performance either in terms of accuracy or response time. A delay interval of 1.0s produced a significant increase in response time but still did not affect recognition accuracy. By contrast, delays of 2.0 and 3.0s determined a significant increase in response time and a reduction in recognition accuracy. These findings indicate the existence in capuchin monkeys of processes enabling a very accurate retention of stimulus features within time frames comparable to those reported for humans' sensory memory (0.5-1.0s). The extent to which such processes can be considered analogous to the sensory memory processes observed in human visual cognition is discussed.

History

Citation

Behavioural Brain Research, 2014, 271, pp. 240-248

Author affiliation

/Organisation/COLLEGE OF MEDICINE, BIOLOGICAL SCIENCES AND PSYCHOLOGY/Themes/Neuroscience & Behaviour

Version

AM (Accepted Manuscript)

Published in

Behavioural Brain Research

Publisher

Elsevier

issn

0166-4328

eissn

1872-7549

Copyright date

2014

Available date

23/11/2015

Publisher version

http://www.sciencedirect.com/science/article/pii/S0166432814003246

Language

en