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Preferences and demands of the white rat for food.
By Young, Paul Thomas
Journal of Comparative Psychology, Vol 26(3), Dec 1938, 545-589.
Abstract
This paper is divided into five parts, each of which reports the results of experiments on some aspect of food preference. The first part concerns spatial factors in feeding behavior. Experiments summarized here demonstrate that there are marked individual differences in right-left dominance, that size and position of food may obscure natural food preferences, that certain techniques may alter apparent preferences in several ways, and that equality of spatial advantage is the most favorable condition for expression of food preference. Part II describes a revolving-cup technique and compares results obtained by its use with those found in research involving other techniques. In Part III there is an evaluation of the ratio of eating to non-eating time as an index of demand for a given food. This ratio was quite variable and is thus considered unsatisfactory. Rate of eating, a study of which comprises the fourth part of this research, is fast at first, and then slower and slower until satiation is reached. The amount of food needed to produce satiation varies with kind and quality of food. A quantitative goal can be determined experimentally for each kind of food. A goal gradient with negative acceleration is noted here. Part V includes discussion of an hypothesis regarding the bodily mechanism of food demand and preference and description of an apparatus for automatically recording the eating rate. (PsycINFO Database Record (c) 2016 APA, all rights reserved)