title: Generalized Identity Matching to Sample after Multiple-Exemplar Training in Capuchin Monkeys.
abstract: A multiple-exemplar identity matching-to-sample baseline was established to encourage development of generalized IDMTS performances in three adult male capuchins. Mask (blank comparison) or Shuffled S- procedures were used to promoteselect(sample-S+) control in baseline relations and to assess stimulus control relations in generalized IDMTS tests. The IDMTS baseline comprised eight 3-stimulus sets or four 4-stimulus sets. Probe trials with new stimulus sets were substituted for baseline sets in successive testing sessions and subsequently converted to new baseline relations. All monkeys exhibited high accuracy on generalized IDMTS tests. A monkey who was given the Mask procedure in training and tests showed generalized IDMTS withselectrelations predominating. Two monkeys who were given training and testing with the Shuffled S- procedure performed somewhat better on Shuffled S- IDMTS test trials than on test trials that contained non-shuffled test IDMTS trials thus suggesting that exclusion of familiar nonmatching comparison stimuli from baseline in Shuffled S-test trials contributed to the higher accuracy scores with the former procedures. Development ofselectrelations appeared to be a positive predictor of development of generalized IDMTS.
authors.affiliation: Universidade Federal do Pará
authors.forename: Ana Leda F
authors.initials: AL
authors.lastname: Brino
authors.affiliation: Universidade Federal do Pará
authors.forename: Olavo F
authors.initials: OF
authors.lastname: Galvão
authors.affiliation: Universidade Federal do Pará
authors.forename: Carlos R F
authors.initials: CR
authors.lastname: Picanço
authors.affiliation: Universidade Federal do Pará
authors.forename: Romariz S
authors.initials: RS
authors.lastname: Barros
authors.affiliation: Universidade Federal do Pará
authors.forename: Carlos B A
authors.initials: CB
authors.lastname: Souza
authors.affiliation: Universidade Federal do Pará
authors.forename: Paulo R K
authors.initials: PR
authors.lastname: Goulart
authors.affiliation: University of Massachusetts Medical School.
authors.forename: William J
authors.initials: WJ
authors.lastname: McIlvane
keywords: capuchin monkeys; generalized identity matching-to-sample; multiple-exemplar training; select and reject relations