Young children's organizational strategies on a same-different task: A microgenetic study and a training study.

This study was designed to explore young children's strategy development using a new kind of "same-different" task that minimized memory demands. Four-year-old children were asked to judge whether 2 sets of 7 toys were the same or different. Sets were identical or differed by one toy, with one set presented on a table and the other in a linen bag. Children's spontaneous behavior was highly strategic, and over trials it developed differently for "same" and "different" trials. Most children who did not spontaneously use the most effective strategy, that is, matching, could be trained to do so and were able to transfer this strategy to new materials. Results concerning production and utilization deficiencies are discussed in relation to task characteristics, trial type (same or different), and findings from prior research.