Intermittent Explosive Disorder (IED): A Critique
Location
LSUHSC-NO
Publication Date
April 2026
Start Date
9-4-2026 10:00 AM
End Date
9-4-2026 2:00 PM
Description
Intermittent Explosive Disorder (IED) is classified in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) as a distinct psychiatric diagnosis defined by recurrent, impulsive, and disproportionate aggressive outbursts. This poster presents a critical examination of the conceptual foundations, measurement practices, reliability, and validity of IED. The historical development of the diagnosis is traced from early psychiatric descriptions of impulsive aggression through its formal introduction in DSM-Ill and subsequent revisions culminating in DSM-5.
The analysis highlights a shift from personality-based conceptualizations of aggression to a syndrome-based, operationalized diagnostic framework. Although revisions to diagnostic criteria were informed by epidemiological and clinical research, the poster argues that key limitations remain. In particular, the diagnostic process relies on a clinician "best-estimate" judgment rather than direct measurement, yielding categorical classification without quantification of disorder magnitude.
Evidence for the reliability of IED, as reflected in interjudge agreement statistics, is reviewed and acknowledged as acceptable. However, the poster emphasizes that reliability is necessary but not sufficient for diagnostic validity. Current validity evidence is critiqued as largely tautological, demonstrating that individuals diagnosed with IED are aggressive and impulsive -characteristics already embedded within the diagnostic criteria- without establishing distinctiveness from other forms of aggression.
The poster further addresses common misapplications of construct validity theory to psychiatric diagnoses, drawing on foundational psychometric frameworks to argue that IED does not constitute a measured construct in the classical sense. Finally, the distinctiveness of IED is examined with reference to intermittence and disproportionate response to provocation, and relevant theoretical perspectives - including hostile attribution bias and overcontrolled hostility - are reviewed as possible explanatory contexts. Overall, the poster concludes that current evidence does not adequately establish IED as a diagnostically distinct form of pathological aggression.
Recommended Citation
Petrie, J.; Pearce, B.; Gibson, J.; Thurber, S.; and Bailey, R., "Intermittent Explosive Disorder (IED): A Critique" (2026). Dept. of Psychiatry Research Symposium. 21.
https://digitalscholar.lsuhsc.edu/psych_rd/2026/posters/21
Intermittent Explosive Disorder (IED): A Critique
LSUHSC-NO
Intermittent Explosive Disorder (IED) is classified in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) as a distinct psychiatric diagnosis defined by recurrent, impulsive, and disproportionate aggressive outbursts. This poster presents a critical examination of the conceptual foundations, measurement practices, reliability, and validity of IED. The historical development of the diagnosis is traced from early psychiatric descriptions of impulsive aggression through its formal introduction in DSM-Ill and subsequent revisions culminating in DSM-5.
The analysis highlights a shift from personality-based conceptualizations of aggression to a syndrome-based, operationalized diagnostic framework. Although revisions to diagnostic criteria were informed by epidemiological and clinical research, the poster argues that key limitations remain. In particular, the diagnostic process relies on a clinician "best-estimate" judgment rather than direct measurement, yielding categorical classification without quantification of disorder magnitude.
Evidence for the reliability of IED, as reflected in interjudge agreement statistics, is reviewed and acknowledged as acceptable. However, the poster emphasizes that reliability is necessary but not sufficient for diagnostic validity. Current validity evidence is critiqued as largely tautological, demonstrating that individuals diagnosed with IED are aggressive and impulsive -characteristics already embedded within the diagnostic criteria- without establishing distinctiveness from other forms of aggression.
The poster further addresses common misapplications of construct validity theory to psychiatric diagnoses, drawing on foundational psychometric frameworks to argue that IED does not constitute a measured construct in the classical sense. Finally, the distinctiveness of IED is examined with reference to intermittence and disproportionate response to provocation, and relevant theoretical perspectives - including hostile attribution bias and overcontrolled hostility - are reviewed as possible explanatory contexts. Overall, the poster concludes that current evidence does not adequately establish IED as a diagnostically distinct form of pathological aggression.