Colour versus quantity as cues in reverse-reward-competent squirrel monkeys (Saimiri sciureus)

The Quarterly Journal of Experimental Psychology : QJEP
James R AndersonKazuo Fujita

Abstract

To assess the relative salience of colour and quantity cues, squirrel monkeys previously trained to reach for the smaller of two quantities of food in a reverse-reward contingency task received colour discrimination training. After initial failure to discriminate between two colours of dots under a differential reinforcement regime, they learned the task when the S- colour was associated with zero reward. The monkeys then showed good retention on the original reverse-reward task of 1 versus 4 with pairs of dots presented in S+ or S- colours. However, on "mismatch" trials of 1S- versus 4S+ , only 2 of 4 monkeys tested showed a preference--1 monkey chose based on quantity, the other based on colour. Individual differences and the possible roles of overshadowing and blocking are discussed.

References

Jul 1, 1997·Journal of Experimental Psychology. Animal Behavior Processes·A OlthofW A Roberts
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Sep 5, 2002·Cognition·Marc D HauserGary Marcus
Aug 1, 1954·Journal of Comparative and Physiological Psychology·J M WARREN
Jan 20, 2005·Journal of Experimental Psychology. Animal Behavior Processes·James R AndersonKazuo Fujita
Dec 13, 2005·American Journal of Primatology·Hannah M Buchanan-Smith
Mar 29, 2006·Primates; Journal of Primatology·Joël FagotChristine Deruelle
Jul 1, 1996·Journal of the Experimental Analysis of Behavior·A Silberberg, K Fujita

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