ANGRY FACES AND THE ATTENTIONAL BLINK 1347 Double-target (experimental) trials Figure 3 shows the mean percentage of double-target trials with correct responses (i.e., trials where both the number and type of target were correctly identified); these data are illustrated as a function of Trial Type (threat, positive, neutral) and Lag (seven levels). An ANOVA of the percentage of correct responses, with Trial Type and lag as independent variables, revealed significant main effects of Trial Type, F(2, 38) 10.22, pB.01, h2p .35, and Lag, F(6, 114) 16.12, pB.001, h2p .54, and a significant interaction between the two, F(12, 228) 1.93, pB.05, h2p .08. To clarify the interaction, a one-way Bonferroni-corrected ANOVA of the percentage of correct responses, with Trial Type (threat, positive, neutral) as the independent variable, was undertaken separately for each lag position. Results showed a significant difference in performance accuracy between the trial types at lag 2, F(2, 38) 16.90, pB.001, h2p .47, and lag 3, F(2, 38) 8.97, p .001, h2p .32. To establish the cause of these differences, pair-wise Bonferroni corrected comparisons for threat, positive and neutral trial types were undertaken at both lag 2 and lag 3. These simple effects analyses revealed that at both lags, performance accuracy was significantly better on threat trials in comparison with neutral trials (lag 2: pB.001; lag 3: pB.01) and also in comparison with positive trials (lag 2: pB.05; lag 3: pB.01). Thus, when the T2 occurred within the 200 400 ms time window of the AB, there was greater accuracy in identifying the second target stimulus when it was a threat face, rather than a neutral or positive face. The pairwise 90 80 t 70 c e r ro60 C t en50 c r e P40 30 20 Threat trials Positive trials Neutral trials 2 3 4 5 Lag position 6 8 9 Figure 3. Mean percentage of correct answers (with standard error bars) on double-target trials; i.e., trials in which both the number of targets and expression of the second target were correctly identiﬁed. The T1 was a neutral face and the T2 was a threat, positive, or a different neutral face; i.e., trial type refers to emotional content of the T2 face.