“…In this and in subsequent experiments (e.g., Angell & Lumsdaine, 1960;Barch & Levine, 1967;Cook, 1958;Cook & Spitzer, 1964;Reynolds, 1967;Levine, 1965) the prompting design involved presentation of the stimulus and then the response (or S-R simultaneously), following which S wrote or called out the response term just presented. Although there may be slight variations in the method, no errors are made during training and retention is measured during interspersed test trials.…”