This study explored the relationship between academic achievement and problems comorbid to attention deficit, such as learning difficulties and classroom oppositional behavior. Korean Educational Development Institute's longitudinal research data was used. Self-report items related to attention deficit, learning difficulties, and classroom oppositional behaviors were selected and utilized from the longitudinal research data. Results indicate that there are statistically significant differences in academic achievement among students with attention deficit, leaning difficulties, or classroom oppositional behaviors. Furthermore, analysis of the academic achievement trajectory spanning three years indicate that attention deficit, learning difficulties, and classroom oppositional behaviors have statistically significant affect on the baseline academic achievement scores. However, with an exception of learning difficulties, other variables do not have statistically significant affect on subsequent academic achievement.
Key words : Attention deficit, Learning difficulties, Classroom oppositional behaviors