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

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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Notes

  1. 1.

    This was surprising because a familiar target was always present, so the testers could have been above chance by always ruling out the familiar target. Tester B.L.S. used this strategy, but tester T.C. never adopted this particular strategy. Based on his incorrect responses, King did not use this strategy either.

References

  1. Baddeley A (2002) The concept of episodic memory. In: Baddeley A, Conway M, Aggleton J (eds) Episodic memory: new directions in research. Oxford University Press, New York, pp 1–10

  2. Bauer HR, Philip MM (1983) Facial and vocal individual recognition in the common chimpanzee. Psychol Rec 33:161–170

  3. Chambers KL, Zaragoza MS (2001) Intended and unintended effects of explicit warnings on eyewitness suggestibility: evidence from source identification. Mem Cogn 29:1120–1129

  4. Clayton NS, Dickinson A (1998) Episodic-like memory during cache recovery by scrub jays. Nature 395:272–274

  5. Clayton NS, Yu KS, Dickinson A (2001) Scrub jays (Aphelocoma coerulescens) form integrated memories of the multiple features of caching episodes. J Exp Psychol Anim Behav Process 27:17–29

  6. Conway MA, Pleydell-Pearce CW (2000) The construction of autobiographical memories in the self-memory system. Psychol Rev 107:261–288

  7. Gibeault S, MacDonald SE (2000) Spatial memory and foraging competition in captive western lowland gorillas (Gorilla gorilla gorilla). Primates 41:147–160

  8. Harper DN, Garry M (2000) Postevent cues bias recognition performance in pigeons. Anim Learn Behav 28:59–67

  9. Jacoby LL (1991) A process dissociation framework: separating automatic from intentional uses of memory. J Mem Lang 30:513–541

  10. Kelley CM, Jacoby LL (2000) Recollection and familiarity. In: Tulving E, Craik FIM (eds) The Oxford handbook of memory. Oxford University Press, New York, pp 215–228

  11. Loftus EF (1979) Eyewitness testimony. Harvard University Press, Cambridge Mass.

  12. Loftus EF (1993) The reality of repressed memories. Am Psychol 48:518–537

  13. Loftus EF, Hoffman HG (1989) Misinformation and memory: the creation of new memories. J Exp Psychol Gen 118:100–114

  14. MacDonald SE (1994) Gorilla’s (Gorilla gorilla gorilla) spatial memory in a foraging task. J Comp Psychol 108:107–113

  15. Menzel CR (1999) Unprompted recall and reporting of hidden objects by a chimpanzee (Pan trogolodytes) after extended delays. J Comp Psychol 113:426–434

  16. Metcalfe, J (1993) Novelty monitoring, metacognition, and control in a composite holographic associative recall model: interpretations for Korsakoff amnesia. Psychol Rev 100:3–22

  17. Morris RGM (2002) Episodic-like memories in animals: psychological criteria, neural mechanisms and the value of episodic-like tasks to investigate animal models of neurodegenerative disease. In: Baddeley A, Conway M, Aggleton J (eds) Episodic memory: new directions in research. Oxford University Press, New York, pp 181–203

  18. Premack D, Woodruff G (1978) Does the chimpanzee have a theory of mind? Behav Brain Sci 4:515–526

  19. Roberts WA (2002) Are animals stuck in time? Psychol Bull 128:473–489

  20. Roediger HL (1996) Memory illusions. J Mem Lang 35:76–100

  21. Schwartz BL (2003) Do non-human primates have episodic memory? In: Terrace H, Metcalfe J (eds) The missing link in cognition: origins of self-knowing consciousness. Oxford University Press, New York (in press)

  22. Schwartz BL, Evans S (2001) Episodic memory in primates. Am J Primatol 55:71–85

  23. Schwartz BL, Colon MR, Sanchez IC, Rodriguez IA, Evans S (2002) Single-trial learning of “what” and “who” information in a gorilla (Gorilla gorilla gorilla): implications for episodic memory. Anim Cogn 5:85–90

  24. Squire LR (1992) Declarative and non-declarative memory: multiple brain systems supporting learning and memory. J Cogn Neurosci 4:232–243

  25. Suddendorf TS, Corballis MC (1997) Mental time travel and the evolution of the human mind. Gen Soc Gen Psychol Monogr 123:133–167

  26. Swartz KB, Evans S (1994) Social and cognitive factors in chimpanzee and gorilla mirror behavior and self-recognition. In: Parker ST, Mitchell RW, Boccia ML (eds) Self-awareness in animals and humans. developmental perspectives. Cambridge University Press, Cambridge, pp 189–206

  27. Tulving E (1983) Elements of episodic memory. Oxford University Press, New York

  28. Tulving E (1993) What is episodic memory? Curr Dir Psychol 3:67–70

  29. Tulving E (2002) Episodic memory and common sense: how far apart? In: Baddeley A, Conway M, Aggleton J (eds) Episodic memory: new directions in research. Oxford University Press, New York, pp 269–288

  30. Tulving E, Lepage M (2000) Where in the brain is the awareness of one’s past. In: Schacter D, Scarry E (eds) Memory, brain, belief. Harvard University Press, Cambridge, Mass., pp 208–230

  31. Washburn DA, Astur RS (1998) Nonverbal working memory of humans and monkeys: rehearsal in the sketchpad. Mem Cogn 26:277–286

  32. Zentall TR, Clement TS, Bhatt RS, Allen J (2001) Episodic-like memory in pigeons. Psychonomic Bull Rev 8:685–690

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Acknowledgements

The research was partially funded by the Grants-in-Aid program from the Florida International University College of Arts and Sciences. Monkey Jungle and the DuMond Conservancy provided logistical support for the project. We are grateful to Monkey Jungle for access to King and for employees’ time. The authors thank Jeannice Blazquez for testing King, and Robert Castillo for constructing stimuli. We thank Sharon Du Mond and Steve Jacques of Monkey Jungle for their encouragement, cooperation, and assistance. We thank Tina Casquarelli, Yuri Mitzkewich, and Julie Kerr of Monkey Jungle for their time and expertise.

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Correspondence to Bennett L. Schwartz.

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Schwartz, B.L., Meissner, C.A., Hoffman, M. et al. Event memory and misinformation effects in a gorilla (Gorilla gorilla gorilla). Anim Cogn 7, 93–100 (2004). https://doi.org/10.1007/s10071-003-0194-7

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Keywords

  • Primates
  • Gorillas
  • Memory
  • Episodic memory
  • Misinformation effects
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