The purpose of this study was to follow the development of children with reading disabilities only, reading disabilites and ADHD, ADHD only, and a comparison group from the ages of 3 to 18. Differences were examined on the following variables: (a) Antecedent variables- Reynell Developmental Language Scales, Temperament, and Family Adversity; (b) School-age variables- behavioral and academic self-concept ratings; and (c) Psychological adjustment variables at age 18- self-reports of delinquency. Children from the reading disabled groups exhibited receptive language deficits, were from families who during the early childhood years had less resources to cope with problem situations, exhibited difficult temperamental characteristics, and had negative academic self-concepts. Distinctions were also noted between a "pervasive" and "situational" presentation of behavioral problems. During late adolescence the reading disabled groups exhibited similar levels of delinquency as their non-disabled peers. The implications of this study and directions for future research are discussed.