“…Here are some examples: At II days of age, rat pups can learn to discriminate the presence or absence of reward on the basis of a singlealternating pattern~approaching a goalbox rapidly on odd-numbered, rewarded trials and greatly suppressing Successive acquisition and extinction (Amsel, Burdette, & Letz, 1976) ,,; I0 days Single patterned alternation (PA) (Stanton, Dailey, & Amsel, 1980) ,,;11 days Partial reinforcement extinction (PREE) (Chen & Amsel, 1980a, 1980cLetz, Burdette, Gregg, Kittrell, & Amsel, 1978) 12-14 days Variable magnitude of reinforcement extinction (VMREE) 16-18 days Partial delay of reinforcement extinction (PDREE) 16-18 days Partial reinforcement acquisition (PRAE) (Chen, Gross, Stanton, & Amsel, 1980) 18-20 days Magnitude of reinforcement extinction (MREE) (Burdette, Brake, Chen, & Amsel, 1976;Chen, Gross, & Amse1, 1981) 20-21 days Successive negative contrast (SNC) 25-26 days Slow responding (DNC) (Chen, Gross, Stanton, & Amsel, 1981) ,,;63 days From "Developmental Psychobiology and Behavior Theory: Reciprocating Influences," by A. Amsel, 1986, Canadian Journal ofPsychology, 40, p. 315. Copyright 1986 In adult rats, some of these behavioral, "emotional" reinforcement-schedule effects and several others have been shown to depend on the integrity of portions of the limbic system and adjacent cortical areas, particularly the hippocampal formation with its connections to the septum and entorhinal cortex.…”