Abstract
Twenty-three 30- and 90-day-old rats either were given 60 nondifferentially reinforced presentations of the to-be-conditional stimulus prior to fear conditioning or remained undisturbed. Following pretraining Ss experienced a series of three CS-US pairings. Subsequently, when Ss were tested for suppression of an ongoing licking response to the CS, 23-day-old Ss displayed less suppression to the CS than did adults. In addition, Ss exposed to the CS prior to conditioning demonstrated less suppression in its presence than did nonexposed Ss. It was suggested that weanlings do not demonstrate the decremental acquisition of a CER characteristic of the “latent inhibition” phenomenon seen in older rats.
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References
Brunner, R. L., Roth, T. G., & Rossi, R. R. Age differences in the development of the CER. Psychonomic Science, 1970, 21, 135–136.
Carlton, P. L., & Vogel, J. R. Habituation and conditioning. Journal of Comparative & Physiological Psychology, 1967, 63, 348–351.
Feigley, D. A., Parsons, P. J., Hamilton, L. W., & Spear, N. E. Development of habituation to novel environments in the rat. Journal of Comparative & Physiological Psychology, 1972, 79, 443–452.
Feigley, D. A., & Spear, N. E. Effect of age and punishment condition on long-term retention by the rat of active- and passive-avoidance learning. Journal of Comparative & Physiological Psychology, 1970, 73, 515–526.
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., Warner, J., & Riccio, D. C. Age differences in conditioning and generalization of fear in young and adult rats. Developmental Psychology, 1970, 3, 119–123.
Kamin, L. J. Temporal and intensity characteristics of the conditioned stimulus. In W. F. Prokasy (Ed.), Classical conditioning: A symposium. New York: Appleton-Century-Crofts, 1965. Pp. 118–147.
Lubow, R. E. Latent inhibition: Effects of frequency of nonreinforced preexposure of the CS. Journal of Comparative & Physiological Psychology, 1965, 60, 454–457.
Lubow, R. E., & Moore, A. V. Latent inhibition: The effect of nonreinforced preexposure to the conditioned stimulus. Journal of Comparative & Physiological Psychology, 1959, 62, 415–419.
Rescorla, R. A. Summation and retardation tests of latent inhibition. Journal of Comparative & Physiological Psychology, 1971, 75, 77–81.
Schulenburg, C. J., Riccio, D. C., & Stikes, E. R. Acquisition and retention of a passive avoidance response as a function of age in rats. Journal of Comparative & Physiological Psychology, 1971, 74, 75–83.
Siegel, S. Latent inhibition and eyelid conditioning. In A. H. Lack and W. F. Prokasy (Eds.), Classical conditioning II: current research and theory. New York: Appleton-Century-Crofts, 1972. Pp. 231–247.
Williams, R. A., & Campbell, B. A. Weight loss and quinine milk ingestion as measures of “hunger” in infant and adult rats. Journal of Comparative & Physiological Psychology, 1961, 54, 220–222.
Winer, B. J. Statistical principles in experimental design. New York: McGraw-Hill, 1962.
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Portions of this paper were presented in partial fulfillment of the requirements for the Master’s degree by the first author. This investigation was supported by Grant GB-24220 from the National Science Foundation to the second author.
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Wilson, L.M., Riccio, D.C. CS familiarization and conditioned suppression in weanling and adult albino rats. Bull. Psychon. Soc. 1, 184–186 (1973). https://doi.org/10.3758/BF03334335
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DOI: https://doi.org/10.3758/BF03334335