Responds to the general criticisms of Rovee-Collier, explaining a proposed new measure of infant memory in terms of four fundamental ideas earlier enumerated by Rovee-Collier and Shyi. Seeks to refute three of four specific criticisms made by Rovee-Collier, and admits a mistake related to the fourth criticism. (BC)

Reviews three response rate measures (in a baseline measurement, immediately after acquisition, and at a long-term retention test) of infant memory that are used in experiments involving infants' conditioned kicking. Compares these measures to a new measure, the fraction of kicking rate remaining after the retention interval. Explains the…