Cebus cf. apella exhibits rapid acquisition of complex stimulus relations and emergent performance by exclusion
Psychol. neurosci. (Impr.)
;
3(2): 209-215, July-Dec. 2010. ilus, graf
Article
in English
| LILACS, INDEXPSI
| ID: lil-604521
ABSTRACT
A "second generation" matching-to-sample procedure that minimizes past sources of artifacts involves (1) successive discrimination between sample stimuli, (2) stimulus displays ranging from four to 16 comparisons, (3) variable stimulus locations to avoid unwanted stimulus-location control, and (4) high accuracy levels (e.g., 90 percent correct on a 16-choice task in which chance accuracy is 6 percent). Examples of behavioral engineering with experienced capuchin monkeys included four-choice matching problems with video images of monkeys with substantially above-chance matching in a single session and 90 percent matching within six sessions. Exclusion performance was demonstrated by interspersing non-identical sample-comparison pairs within a baseline of a nine-comparison identity-matching-to-sample procedure with pictures as stimuli. The test for exclusion presented the newly "mapped" stimulus in a situation in which exclusion was not possible. Degradation of matching between physically non-identical forms occurred while baseline identity accuracy was sustained at high levels, thus confirming that Cebus cf. apella is capable of exclusion. Additionally, exclusion performance when baseline matching relations involved non-identical stimuli was shown
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Cebus
/
Discrimination Learning
Limits:
Animals
Language:
English
Journal:
Psychol. neurosci. (Impr.)
Journal subject:
Neurology
/
Psychology
Year:
2010
Type:
Article
/
Project document
Affiliation country:
Brazil
/
United States
Institution/Affiliation country:
Universidade Federal do Pará/BR
/
University of Massachusetts/US
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