Broadening with a larger sample size is necessary to appropriately capture change from this intervention (e.g., provide more power to detect differences in self-report measures; examine individual outcomes rather than group-level outcomes), assess contributors to differential outcomes (e.g., NF1 physical features, cognitive functioning, ADHD status or level of social skills challenges on norm-referenced assessments), and control for drop out and missing data using sophisticated statistical techniques. This evidence concerns the gene NF1 and attention deficit-hyperactivity disorder.