Abstract
Effects of viscosity upon licking were studied by providing rats with thick and thin.4% saccharin solutions in separate 1-h sessions. Volumetric intake/lick was greater for the thin than for the thick solution and was the only measure affected by viscosity. As the session progressed, the two solutions caused (1) comparable satiation effects, as evidenced by comparable decreases in several indices of the average rate of ingestion; (2) comparable decreases in the average duration of the lick; and (3) no reliable change in the average volumetric intake of the lick. The results were related to earlier comparisons of liquid food and saccharin and indicated that the differences produced by the latter solutions are not fully attributable to their differential viscosity.
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Wilcove, W.G., Allison, J. Macro- and microbehavioral response to viscosity among rats licking saccharin. Psychon Sci 26, 161–163 (1972). https://doi.org/10.3758/BF03335467
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DOI: https://doi.org/10.3758/BF03335467