TY - JOUR AU - O'Brien, John AB - Previous research employing factor-analytic procedures to study the underlying dimensions of DSM-III attention deficit disorder with hyperactivity (ADDH) symptoms have consistently supported a two-factor model. Revision of the structure of the ADHD diagnosis in DSM-HI-R, as well as inclusion of new items, has raised the question of comparability of the two diagnoses. To explore the significance of these changes, teacher ratings of DSM-III ADDH items and DSM-III-R ADHD items of 85 nonreferred school children were factor-analyzed to determine their underlying factor structures. A similar two-factor solution was obtained for each diagnostic scale. The factors consisted of items believed to reflect inattention and hyperactivity-impulsivity constructs. These factors were further evaluated against results of a cognitive test battery to ascertain whether objective, external validation could be demonstrated. The hyperactivity-impulsivity factor scores were related to continuous performance test measures of response inhibition, while inattention-disorganization factor scores were related to measures of attention and visual search. Implications for assessment and diagnosis of ADHD are discussed. TI - The factor structure of ADHD items in DSM-III-R: Internal consistency and external validation JF - Journal of Abnormal Child Psychology DO - 10.1007/BF01261603 DA - 2004-12-16 UR - https://www.deepdyve.com/lp/springer-journals/the-factor-structure-of-adhd-items-in-dsm-iii-r-internal-consistency-f0ae4Eweup SP - 441 EP - 453 VL - 21 IS - 4 DP - DeepDyve ER -