Abstract
Abstract Objective The current study compares performance on measures of executive functioning in individuals with a history of 2 or more mTBI versus those with a single documented mTBI. Specific interaction with emotional distress was explored. Method A database from neuropsychological assessment of individuals noting deficits following head injury including 273 individuals provided a sample of 174 males, 98 females (one case missing data); mean age = 21.82 years; mean education = 10.16 years. Executive functioning was measured using the Trails Making Test Form B (TMT-B), Delis-Kaplan Executive Function System (DKEFS) Design Fluency, and Semantic Fluency instruments. Emotional distress was assessed using the Beck Depression Inventory (BDI) and the Beck Anxiety Inventory (BAI). Results MANCOVA was employed to determine the effect of multiple head injuries versus one upon cognitive performance after controlling for depression and anxiety. Group differences between those with one versus 2 or more mTBI were present (Wilk’s η = 0.907, F (3, 125) = 4.256, p = 007, Partial η2 = 0.093). Significant differences were not noted with regard to emotional distress (BAI, p = 0.97 l BDI, p = 0.87). Between subject effects identified significant differences between groups in performance on DKEFS Design Fluency (p = 0.05) and Semantic Fluency (P = 0.04), while significant groups differences were not evident Trailmaking Test B performance (P = 0.20). Conclusion Overall, those who had previous concussions performed better on measures of executive functioning. Measures of emotional functioning were not a significant covariate of cognitive performance. Implications and limitations of the current study will be discussed.
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