Getting explicit memory off the ground: Steps toward construction of a neuro-developmental account of changes in the first two years of life

Historically, infants and very young children were thought incapable of explicit memory. As a result of changes in theoretical perspective and methodological developments, this assumption was challenged in the latter part of the 20th century. Substantial progress was made in describing age-related changes in explicit memory in the first two years of life. These developments permitted the first steps toward construction of a neuro-developmental account of the changes. By considering the timing and course of development of the neural substrate responsible for explicit memory we are able to bring greater specificity to the question "what develops?" Thus far, behavioral and electrophysiological methods (event-related potentials: ERPs) have revealed both individual and age-related variability in encoding and in consolidation and storage processes; the variability is systematically related to variability in long-term explicit memory. Suggestions are made for additional research to further our understanding of relations between brain and behavioral development in the first years of life. (C) 2004 Elsevier Inc. All rights reserved.