Talking through transitions: Microgenetic changes in preschoolers’ private speech and executive functioning

In this study we explored the relation between private speech and task mastery by using the microgenetic method to examine the language and performance of 13 children aged 4 and 5 as they gained expertise with a spatial, multi-step planning task across 6 sessions. Seven of the 13 children’s performances across these sessions were characterized by a sharp change in performance between two consecutive sessions. Detailed microgenetic examinations of individual children suggested that abrupt improvements in performance were associated with a higher use of on-task private speech. More variability was noted in the problem-solving and private speech patterns of children who did not experience abrupt shifts in performance. Implications regarding the role of individual differences in the use of private speech during problem-solving are discussed.