Abstract
Forty-eight Vantress × Arbor Acre chicks were reared either in groups of 12 or individually until 3 days old and then trained individually in an autoshaping keypecking situation using heat reinforcement. Following six training sessions of 24 trials each, all chicks were given two extinction sessions of 24 trials each. Major findings were as follows: (1) The isolation-reared chicks made significantly more responses with shorter latencies during training than did the social-reared chicks; (2) the isolation-reared chicks extinguished more slowly than did the socialreared chicks, reflecting mainly the terminal acquisition differences between the two rearing groups.
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This work was supported by Grant MH 24260 from the National Institute of Mental Health and by the Human Developmental Studies Program of the College of Medicine, University of Kentucky, with funds granted by the Foundations’ Fund for Research in Psychiatry (T64-205). The authors are grateful to S. Curtis, K. Martynowicz, and P. Murphy for their assistance during behavioral testing, and to D. McFarland for his assistance in data reduction and analysis.
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Zolman, J.F., Hall, J.A. & Sahley, C.L. Effects of isolation rearing on keypecking in young domestic chicks. Bull. Psychon. Soc. 10, 506–508 (1977). https://doi.org/10.3758/BF03337712
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DOI: https://doi.org/10.3758/BF03337712