(1) Pollard provoked the ejection of 3% and the ejection time shortened from 2.29 toats (20%) can at least partially be ascribed to milk release during food intake.
(2) A modification of Toates's (1981) incentive model of ingestive behavior was suggested to incorporate relativity effects based on both associative and nonassociative factors in the consumption of both nutritive and nonnutritive substances.