Figure 1

The time courses of oxy-Hb concentration in 5- to 6-month-olds (A and B) and 7- to 8-month-olds (C and D). The time course of the oxy-Hb concentration in the bilateral temporal areas obtained from the 12 channels for each hemisphere under the different-face condition (the black line) and the same-face condition (the gray line) in 5- to 6-month-olds (A and B) and 7- to 8-month-olds (C and D). Zero on the horizontal axis represents the beginning of the test period, and 10 represent the end of the test period.