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SAMPLE STIMULUS CONTROL SHAPING AND RESTRICTED STIMULUS CONTROL IN CAPUCHIN MONKEYS: A METHODOLOGICAL NOTE
Author(s) -
Brino Ana Leda F.,
Barros Romariz S.,
Galvão Olavo F.,
Garotti M.,
Cruz Ilara R. N.,
Santos José R.,
Dube William V.,
McIlvane William J.
Publication year - 2011
Publication title -
journal of the experimental analysis of behavior
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.75
H-Index - 61
eISSN - 1938-3711
pISSN - 0022-5002
DOI - 10.1901/jeab.2011.95-387
Subject(s) - stimulus control , stimulus (psychology) , computer science , psychology , artificial intelligence , cognitive psychology , neuroscience , nicotine
This paper reports use of sample stimulus control shaping procedures to teach arbitrary matching‐to‐sample to 2 capuchin monkeys ( Cebus apella ). The procedures started with identity matching‐to‐sample. During shaping, stimulus features of the sample were altered gradually, rendering samples and comparisons increasingly physically dissimilar. The objective was to transform identity matching into arbitrary matching (i.e., matching not based on common physical features of the sample and comparison stimuli). Experiment 1 used a two‐comparison procedure. The shaping procedure was ultimately effective, but occasional high error rates at certain program steps inspired a follow‐up study. Experiment 2 used the same basic approach, but with a three‐comparison matching task. During shaping, the monkey performed accurately until the final steps of the program. Subsequent experimentation tested the hypothesis that the decrease in accuracy was due to restricted stimulus control by sample stimulus features that had not yet been changed in the shaping program. Results were consistent with this hypothesis, thus suggesting a new approach that may transform the sample stimulus control shaping procedure from a sometimes useful laboratory tool to a more general approach to teaching the first instance of arbitrary matching performances to participants who show protracted difficulties in learning such performances.