Ž . Psychiatry Research 101 2001 259267 Validation of the Interview Module for Intermittent ž / Explosive Disorder M-IED in children and adolescents: a pilot study Rene L. Olvera  , Steven R. Pliszka, William M. Konyecsni, Yadira Hernandez, Stacy Farnum, Roger F. Tripp Di  ision of Child and Adolescent Psychiatry, Uni  ersity of Texas Health Science Center at San Antonio, 7703 Floyd Curl Dri  e, San Antonio, TX 78284-7792, USA Received 25 July 2000; received in revised form 11 January 2001; accepted 14 January 2001 Abstract We identified a subset of impulsive, aggressive children as having symptoms that met criteria for Intermittent Ž . Ž . Explosive Disorder IED using the Interview Module for Intermittent Explosive Disorder M-IED . The M-IED was administered to 34 children and adolescents between the ages of 10 and 17. These data provide initial evidence for the M-IED as a useful instrument in the diagnosis of IED in adolescents. The M-IED displayed a high level of inter-rater reliability and adequate test  retest reliability. Construct validity was supported by the fact that the subjects with IED symptomatology had significantly more lifetime aggression, oppositionality, inattention and hyperactivityimpulsivity compared to community controls. In addition, the subjects with IED symptomatology had a significantly greater number of episodes of lifetime physical aggression and documented episodes of aggression while in residential treatment compared to psychiatric controls. The subjects with IED symptomatology had a greater number of positive screening questions for DSM-IV diagnoses using the Swanson, Nolan and Pelham questionnaire Ž . SNAP-IV , particularly those related to IED and posttraumatic stress disorder than psychiatric controls.  2001 Elsevier Science Ireland Ltd. All rights reserved. Keywords: Intermittent explosive disorder; Aggression; Diagnostic instrument  Corresponding author. Tel.: 1-210-567-5484; fax: 1-210-567-5677. Ž . E-mail address: olverar@uthscsa.edu R.L. Olvera . 0165-178101$ - see front matter  2001 Elsevier Science Ireland Ltd. All rights reserved. Ž . PII: S 0 1 6 5 - 1 7 8 1 01 00224-4