Abstract
When young rats, as well as humans, are presented with diets that differ in caloric density (kilocalories/gram), they prefer the calorically dense diet. How these preferences change with age is not known. A 2 by 2 by 3 by 7 experiment, representing strain, age, caloric-density difference, and day sets, was carried out in order to determine the influence of these factors on preference for calorically dense diets. The results indicated that, depending on the strain, old rats prefer calorically dense diets either to an equal degree or to a lesser degree than do young rats.
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This research was supported by 821 Funds of the Veterans Administration.
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Jakubczak, L.F. Age differences in caloric-density preference as a function of strain of rats. Bull. Psychon. Soc. 1, 395–396 (1973). https://doi.org/10.3758/BF03334381
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DOI: https://doi.org/10.3758/BF03334381