“…Finally, in situations in which retrieval is tested in the absence of explicit list or copy cues, specifically, the tasks of free recall (Bustamante, Jordan, Vila, Gonzalez, & Insua, 1970, Cases 05 and 06;Bustamante, Rossello, Jordan, Pradere, & Insua, 1968, Cases 03 and 04;Darley et al, 1974, Case 12;Miller et aI., 1978, Experiment 2, Case 32; R. C. Petersen, 1977, Cases 3941;Weingartner, 1978 (Goodwin et aI., 1969, Case 27;Hill et al, 1973, Cases 28 and 29;Stillman et al, 1974, Case 47;Weingartner, Eich, & Allen, 1973, Case 54), it is convenient to assume that information necessary for retrieval is carried by invisible cues:…”