Objective: The Comprehensive Trail-Making Test (CTMT) is sensitive to brain injury and successful performance requires a variety of cognitive abilities. However, little research has examined neurocognitive abilities that influence CTMT performance in clinical populations. Research indicates CTMT simple sequencing (SS) and complex sequencing (CS) factors differ between clinical and non-clinical populations, supporting the need for validity studies of CTMT scores in clinical populations. This study extends prior research by examining neurocognitive correlates that underlie performance on CTMT factor scores in a large sample of children with neurological disorders. Method: The sample consisted of 98 children with various neurological disorders, primarily TBI (n = 71) or AVM/Stroke (n = 10). They were 14.7 years old and 65.3% male. Glasgow coma scale scores of children with TBI indicated severe brain injuries (GCS = 6.0). Participants were selected from a consecutive series of cases refereed for neuropsychological assessment and included if administered the...

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