“…(3) An investigation of taste-aversion learning in infancy may shed light on whether, or to what extent, this phenomenon may depend on "learning to learn" (Harlow, 1949). Taste-aversion learning has 2 distinctive features: the unusual selectivity of the taste-poison association Green, Bouzas, & Rachlin, 1972), and the lengthy interstimulus intervals over which this learning can occur (Etscorn & Stephens, 1973;Garcia, Ervin, & Koelling, 1966;Smith & Roll, 1967). These characteristics might represent either an evolutionary specialization of learning, as argued by Rozin & Kalat (1971), or, perhaps, the adult animal's repeated experiences with foods and the often delayed visceral consequences.…”