Chunk #29 — Results — Effects of Externalizing Proneness on Brain Responses to Performance Feedback — Omnibus analysis: Effects of feedback condition and externalizing proneness on TF component scores
Main effects were observed for Band, F(1,147) = 103.08, p < .001, Feedback, F(1,147) = 7.02, p < .009, and Externalizing, F(1,147) = 7.97, p < .007. The main effect for Band reflected the greater energy generally evident at lower frequencies (e.g., delta) in biological signals such as ERPs. The Feedback main effect was superseded by a Feedback × Band interaction, F(1,147) = 91.91, p < .001, representing the opposing direction of the gain/loss difference for theta relative to delta described earlier in the Data Reduction section. The main effect of Externalizing was also moderated by significant Band × Externalizing and Feedback × Externalizing interactions, Fs(1,147) = 9.80 and 4.99, respectively, p < .002 and p < .027. The robust Band × Externalizing interaction corroborated the major inference derived from the data in Figure 3—namely, that delta-P300 was broadly reduced for individuals higher in externalizing proneness, whereas theta-FRN exhibited no measurable relationship with externalizing proneness. The Externalizing × Feedback interaction effect, although significant, was modest in relation to the Externalizing × Band effect. In addition, some evidence of a 3-way
