Figure 1.

A, Examples of the image stimuli for each condition. There were two facial expression conditions, angry and neutral, and three facial color conditions, original (no manipulation), red (a* + 12 units), and green (a* − 12 units). Two face models (1 woman and 1 man) were used for each of the six conditions (2 facial expression × 2 facial color). B, Examples of presentation order for the oddball task. Standard stimuli are presented at high frequency, and target stimuli are presented at low frequency. The faces in the figure are from one of the authors (Y.H.) and were not used in the experiment.