Self-concept to performance congruence was assessed for academically-able ninth graders (54 females, 49 males) in both math and verbal content domains. Overall, the majority of these able learners fell outside the congruent range. Analyses revealed similar congruence patterns for females and males, in both subject areas. These findings suggest that, regardless of gender or content area, able adolescents may be at risk for unrealistic self-concept perceptions relative to their performance. (Two tables present data and statistical analysis. Contains 17 references.) (Author)