Figure 4.

The mean imitation scores (+1 SE) of independent groups of 9-month-old infants as a function of preexposure regimen. Left panel: The mean imitation scores of the experimental groups. Right panel: The mean imitation scores of the pairing control groups. An asterisk indicates that a test group exhibited significant deferred imitation (i.e., SPC); its mean imitation score was significantly higher than the mean test score of the 9-month pooled baseline control group (dashed line). The fraction above each error bar indicates the proportion of infants in each group that exhibited deferred imitation.