Hunger motivation in goldthioglucose-treated and genitically obese female mice.

Genetically obese, goldthioglucose-injected, and control mice were compared for strength of hunger motivation as assessed by their performance on the following tasks: taste reactivity, readiness to eat, food-directed activity, and passive avoidance. On the basis of these tests, it appears that genetically obese mice have greater strength of hunger motivation than either goldthioglucose-injected or control mice, while goldthioglucose-injected and control mice exhibit similar strength of hunger motivation.