Overall, P1 was earlier in response to distressed (111 ms, SE = 1.26) vs. neutral faces (114 ms, SE = 1.33), as shown by the significant "emotion" factor (F[1,38] = 8.65, p < 0.005). The analysis of P1 latency values also showed a strong "gender" effect (F[1,38] = 7.56; p < 0.009) with earlier P1 responses in women (111 ms, SE = 1.11) than men (115 ms, SE = 1.11), as shown in Fig. 1.
