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Taste Thresholds and Taste Preferences of Rats for Five Common Sugars¹

Five Figures

Psychobiological Laboratory, The Phipps Psychiatric Clinic, The Johns Hopkins Hospital, Baltimore, Maryland

1. Rats distinguished between sugar solution and distilled water in the following concentrations:

2. They showed the greatest preference for maltose, next for glucose and sucrose, only a slight appetite for galactose, and none for lactose.

3. The animals exhibited the greatest preference for solutions of the various sugars when offered in concentrations near 10%. This agreed closely with concentrations of sugar solutions most commonly used by humans to sweeten drinks.

4. On the basis of results of previous self-selection reports it was concluded that, when offered in purified form to adult animals, maltose may be utilized better than the other sugars, lactose least well.

Manuscript received 4 March 1940.