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      Event memory and misinformation effects in a gorilla (Gorilla gorilla gorilla).

      Animal Cognition
      Animals, Deception, Discrimination Learning, Gorilla gorilla, psychology, Male, Pattern Recognition, Visual, Photography, Recognition (Psychology)

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          Abstract

          Event memory and misinformation effects were examined in an adult male gorilla ( Gorilla gorilla gorilla). The gorilla witnessed a series of unique events, involving a familiar person engaging in a novel behavior (experiment 1), a novel person engaging in a novel behavior (experiment 2), or the presentation of a novel object (experiment 3). Following a 5- to 10-min retention interval, a tester gave the gorilla three photographs mounted on wooden cards: a photograph depicting the correct person or object and two distractor photographs drawn from the same class. The gorilla responded by returning a photograph. If correct, he was reinforced with food. Across three experiments, the gorilla performed significantly above chance at recognizing the target photograph. In experiment 4, the gorilla showed at-chance performance when the event was followed by misinformation (a class-consistent, but incorrect photograph), but significantly above-chance performance when no misinformation occurred (either correct photograph or no photograph). Although the familiarity can account for these data, they are also consistent with an episodic-memory interpretation.

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          Author and article information

          Journal
          15069608
          10.1007/s10071-003-0194-7

          Chemistry
          Animals,Deception,Discrimination Learning,Gorilla gorilla,psychology,Male,Pattern Recognition, Visual,Photography,Recognition (Psychology)

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