Abstract
Groups of rats of 20-22 and 78-80 days of age were given CER training to a tone. Two other groups at each age were either given tone-alone presentations or randomized presentations of tone and shock At testing, some subjects were presented with the training tone and others with one of two generalization tones. A heart-rate ratio indicated little evidence of acquisition in adults and flat generalization curves In contrast, young subjects showed clear CER learning and a steep generalization curve.
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Campbell, B. A., & Campbell, E. H. Retention and extinction of learned fear in infant and adult rats. Journal of Comparative and Physiological Psychology, 1962, 55, 1–8.
Edwards, A. L. Statistical design in psychological research 3rd Ed. New York: Holt, Rinehart, 1968.
Frieman, J. P., Frieman, J., Wright, W., & Hegberg W., Developmental trends in the acquisition and extinction of conditioned suppression in rats. Developmental Psychology, 1971, 4, 425–428.
Frieman, J. P., Rohrbaugh, M. & Riccio, D. C. Age differences in the control of acquired fear by tone. Canadian Journal of Psychology, 1969, 23, 237–244.
Frieman, J. P., Warner, J. & Riccio, D. C. Age differences in conditioning and generalization of fear in young and adult rats. Developmental Psychology, 1970, 3, 119–123.
Kirby, R. H. Acquisition, extinction and retention of an avoidance response as a function of age. Journal of Comparative and Physiological Psychology, 1963, 56, 158–162.
Rohrbaugh, M. & Riccio, D. C. Stimulus generalization of learned fear in infant and adult rats. Journal of Comparative and Physiological Psychology, 1968, 66, 530–533.
Rundle, G. P., Niemi, R. & Thompson, W. R. Sensory preconditioning effects in young and adult rats. Canadian Journal of Psychology, 1971, 25, 323–325.
Snedden, D. S., Spevak, A. A., & Thompson, W. R. Conditioned and unconditioned suppression as a function of age in rats. Canadian Journal of Psychology, 1971, 25, 313–322.
Vanderwolf, C. H., & Vanderwolf, M. L. Relations of heart rate to motor activity and arousal in the rat. Canadian Journal of Psychology, 1970, 24, 434–442.
Winer, B. J. Statistical Principles in experimental design. New York: McGraw-Hill.
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This work was supported by grants-in-aid from the National Research Council of Canada (AP-180), the Queen’s University Research Committee and by a Canada Council Senior Fellowship to the second author.
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McGaughey, T.P., Thompson, W.R. Stimulus generalization of a CER in young and adult rats. Bull. Psychon. Soc. 5, 228–230 (1975). https://doi.org/10.3758/BF03337613
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DOI: https://doi.org/10.3758/BF03337613