Discrimination of moving video images of self by pigeons (Columba livia)
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The ability to recognize self has been known to be limited to some animal species, but previous research has focused almost exclusively on the animal’s reaction to a mirror. Recent studies suggest that the temporal contingency between a subject’s action and the corresponding visual scene reflected in a mirror plays an important role in self-recognition. To assess the roles of visual-proprioceptive contiguity in self-recognition, we explored whether pigeons are able to discriminate videos of themselves with various temporal properties. We trained five pigeons to respond to live video images of themselves (live self-movies) and not to video filmed during previous training sessions (pre-recorded self-movies). Pigeons learned to peck trial-unique live self-movies more frequently than pre-recorded self-movies. We conducted two generalization tests after pigeons learned to discriminate between the two conditions. First, discrimination acquired during training sessions was transferred to a test session involving live self-movies and new pre-recorded self-movies. Second, the same pigeons were tested in extinction procedure using delayed live self-movies and new pre-recorded self-movies. Although pigeons responded to delayed presentations of live self-movies more frequently than to new pre-recorded self-movies, the relative response rate to delayed presentation of live self-movies gradually decreased as the temporal discrepancy between pigeons’ own behavior and the corresponding video increased. These results indicate that pigeons’ discrimination of self-movies with various temporal properties was based on the temporal contiguity between their behavior and its visual feedback. The methodology used in the present experiment is an important step toward improving the experimental analysis of self-recognition in non-human animals.
KeywordsMotion Pigeons Birds Self-recognition Visual discrimination
We are grateful to Dr. A. C. Catania and Dr. K. Goto for their valuable comments on this manuscript and to K. Shinozuka for technical support during the experiment. The twenty-first Century Centre of Excellence (COE) Program (D-1) provided financial support to S. Watanabe. All experiments were conducted in accordance with Keio University’s Guidelines for Care and Use of Animals.
- Ferster CB, Skinner BF (1957) Schedules of reinforcement. Appleton-Century-Crofts, New YorkGoogle Scholar
- Griffin DR (2001) Animal minds: beyond cognition to consciousness. University of Chicago Press, ChicagoGoogle Scholar
- Jitsumori M, Natori M, Okuyama K (1999) Recognition of moving video images of conspecifics by pigeons: effects of individuals, static and dynamic motion cues, and movement. Anim Learn Behav 27:303–315Google Scholar
- Marten K, Psarakos S (1994) Evidence of self-awareness in the bottlenose dolphin (Tursiops truncatus). In: Parker ST, Mitchell RW, Boccia ML (eds) Self-awareness in animals and humans: developmental perspectives. Cambridge University Press, Cambridge, pp 361–379Google Scholar
- Parker ST, Mitchell RW, Boccia ML (1994) Self-awareness in animals and humans: developmental perspectives. Cambridge University Press, CambridgeGoogle Scholar
- Patterson FG, Cohn RH (1994) Self-recognition and self-awareness in lowland gorillas. In: Parker ST, Mitchell RW, Boccia ML (eds) Self-awareness in animals and humans: developmental perspectives. Cambridge University Press, Cambridge, pp 273–290Google Scholar
- Pickering SPC, Duverge L (1992) The influence of visual stimuli provided by mirrors on the marching display of lesser flamingos, Poeniconais minor. Anim Behav 43:1048–1050Google Scholar
- Shimizu T (1998) Conspecific recognition in pigeons (Columba livia) using dynamic video images. Behaviour 135:43–53Google Scholar
- Thompson RKR, Contie C (1994) Further reflections on mirror-usage by pigeons: lessons learned from Winnie-the-Pooh and Pinnochio too. In: Parker ST, Mitchell RW, Boccia ML (eds) Self-awareness in animals and humans: developmental perspectives. Cambridge University Press, Cambridge, pp 392–409Google Scholar
- Watanabe S, Furuya I (1997) Video display for study of avian visual cognition: from psychophysics to sign language. Int J Comp Psychol 10:111–127Google Scholar