Discourse analysis methodology and EEG/ERP methodology has been used to investigate language and communication problems following traumatic brain injury (TBI). However, the relationship between the ERP P600, quality of life (QOL), and social adjustment (SA) have not been studied in individuals with TBI. The present study, therefore, examine the association between P600, QOL, SA by using cognitive assessment, EEG recording, and psychosocial measures. The hypothesis was that there would be a group/individual difference in cognitive functioning, individuals with TBI will have a P600 effect, and an association between P600, QOL, and SA. Despite the small sample size, significance was found for individual differences in a variety of cognitive test. Visual inspection and inferential analysis revealed that there no P600 effect. However, post-hoc analysis revealed a LAN effect and that the TBI group had significant negative correlation between participation (MPAI-4 subscale) and the average wave difference located on the left anterior and left posterior region. Implications of this study in the context of the literature on TBI, QOL, and SA are discussed.
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