The factor structure of DSM-IV attention deficit-hyperactivity symptoms: Aconfirmatory factor analysis of the ADHD-SRS

Since the inception of DSM-IV: considerable research has focused on the con ceptualization of attention deficit-hyperactivity disorder (ADHD) as a mult idimensional construct. This study utilized confirmatory factor analysis (C FA) to examine the adequacy of fit for the two-factor model (hyperactivity/ impulsivity and inattention) previously specified for the ADHD Symptoms Rat ing Scale (ADHD-SRS), Parent Version. The invariance of this model across g ender was then examined using a second, independent sample of children. The results indicate that a two-factor model provides the best fit for the dat a using the ADHD-SRS. Additionally findings suggested that this model is in variant across gender. These results provide support both for the psychomet ric properties of the ADHD-SRS and the subtypes of ADHD specified in the DS M-IV.