Linking of serially ordered lists by macaque monkeys (Macaca mulatta): list position influences |
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Authors: | Treichler F Robert Raghanti Mary Ann Van Tilburg Debra N |
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Affiliation: | Department of Psychology, P.O. Box 5190, Kent State University, Kent, Ohio 44242-0001, USA. rtreichl@kent.edu |
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Abstract: | Five monkeys (Macaca mulatta) were trained on 2 sets of 3 5-item serially ordered lists. Then, each set was either linked or not in a counterbalanced, within-subject design. Linking entailed training on the 2 pairs that ordered the 3 5-item lists into a single overall 15-item series. Choices on novel pairings after linking conditions attempted to define the unique contributions of knowledge of within-list ordinal position and between-lists link training. With linkage, the series was immediately treated as a 15-item ordered list. Without linkage, choices reflected list positions from initial learning, but continued testing with directional reward yielded gradual ordering into a 15-item list. Apparently, monkeys remembered and used initial list-position information, but linkage allowed inference of an integrated serial relationship among items. Results supported primate list memory as an organizational process. |
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