Neuropsychological tests assessing spatial working memory and executive functioning were administered using the Computerized Multiphasic Interactive Neuropsychological DualDisplay System (CMINDS) (http://www.neurocomp.com/Solutions/Cminds). The following computerized tests were administered: Trail Making Test Parts A and B (a measure of visual attention and task switching), Digit Span Forward and Backward (verbal working memory), and Visuospatial Sequencing Test Forward and Reverse (visuospatial working memory). The Visuospatial Sequencing Test was added after data collection had already begun, so these data are available for only 89 FHP (92.7%) and 81 FHN (84.4%) participants. Mean differences between groups have previously been reported by Henderson et al.6 Consequently, we report here correlations between connectivity and performance on these measures.
