Symbolic Insight and Inhibitory Control: Two Problems Facing Young Children on Symbolic Retrieval Tasks

Many recent studies have explored young children's ability to use information from physical representations of space to guide search within the real world. In one commonly used procedure, children are asked to find a hidden toy in a room after observing a smaller toy being hidden in the analogous location in a scale model of the room. Three-year-old children readily find the hidden toy, although children at 2.5 years often have difficulty with the task. This experiment examined the causes of 2.5-year-olds' difficultly with this symbol system by incorporating testing procedures previously used with chimpanzees. Results indicate that young children's poor performance primarily stems from a difficulty achieving symbolic insight (i.e., recognizing the model-room representational relationship) but is also strongly affected by deficits in inhibitory control.