Fig. 1.

Infants’ generalization of habituation from increasing number to increasing length or from decreasing number to decreasing length. The illustrations in (a) show the numerical and line displays presented in Experiment 1. The examples include the numerical displays used during habituation (top) and the arrays of line lengths used during testing (bottom); sequences of increasing magnitude are shown on the left, and sequences of decreasing magnitude are shown on the right. The graph (b) shows mean looking times for the first three and last three habituation trials and for the test trials, which varied in whether novel or familiar orderings of lengths were displayed. Error bars represent standard errors of the mean.