COGA has also assessed various aspects of cognitive function with neuropsychological batteries since its inception, with emphasis on different aspects of cognitive function depending on the life stage of the sample under study (Table 2 details specific neurocognitive assessments at different waves of COGA). In the initial COGA study, a comprehensive, wide range of neuropsychological assessments were obtained on the sample (aged 7–79) to assess child and adult verbal, non‐verbal and fluid intelligence, abstract reasoning, planning, verbal learning and memory, reading, comprehensive and mathematical abilities, and visual attention. These tests include: Wechsler Adult Intelligence Scale Revised (WAIS‐R), 88 Wechsler Intelligence Scale for Children Revised (WISC‐R), 89 Wide Range Achievement Test Revised (WRAT‐R), 90 Trail Making Test (TMT), 91 Porteus Maze Test (PMT), 92 and California Verbal Learning Test, Adult (CVLT‐A) 93 and Child (CVLT‐C). 94 During the subsequent waves of data collection (i.e., the prospective study of adolescents and young adults), we focused on neuropsychological assessments of frontal lobe function, which are undergoing maturation during adolescence and young adulthood. Neuropsychological assessments of frontal executive function, such as planning and problem‐solving
