Is The Multidimensional Anger Test Accurate

The Multidimensional Anger Test (MAT) is a widely circulated online self-report questionnaire that claims to measure different dimensions of anger experience. It appears on IDRlabs and similar test aggregator sites and is completed millions of times per year. Understanding what this test actually measures — and where its scientific limitations lie — is important for interpreting your result accurately.

What the MAT Claims to Measure

The Multidimensional Anger Test draws on a model of anger that distinguishes multiple components: anger frequency (how often anger is experienced), anger duration (how long anger episodes last), anger magnitude (how intense anger episodes are), hostile outlook (generalised negative expectations about others and the world), and anger-in vs. anger-out (whether anger is expressed or suppressed). The test typically produces scores on these subscales alongside an overall anger profile.

The theoretical framework reflects legitimate psychological research. Spielberger's State-Trait Anger Expression Inventory (STAXI) and the work of researchers including Raymond Novaco established multidimensional models of anger in the 1980s and 1990s, and the conceptual distinction between anger frequency, duration, intensity, and expression style is clinically meaningful.

Is It Psychometrically Valid?

The critical question is whether the specific IDRlabs MAT has been validated against clinical standards. Validated psychological tests require: a standardised item development process; administration to representative normative samples for comparison; tests of internal consistency (do subscale items correlate with each other as expected?); and evidence of external validity (do scores predict relevant outcomes, and do they correlate with other validated anger measures?).

The IDRlabs MAT, like most online psychological tests on commercial platforms, has not been published in peer-reviewed journals with full psychometric validation data. The normative comparisons it uses (telling you that you score in the "top 5% for hostility," for example) are based on whoever has taken the test online — a convenience sample rather than a representative population sample. This significantly limits the accuracy of percentile claims.

By contrast, validated clinical instruments like the STAXI-2 (Spielberger, 1999) and the Novaco Anger Scale and Provocation Inventory (NAS-PI) have robust normative data from clinical and population samples and are used in research, forensic, and clinical settings where accuracy matters.

What an Anger Test Can and Cannot Tell You

A well-constructed self-report anger measure — even the IDRlabs MAT — can provide a useful starting point for self-reflection: identifying which dimensions of anger (frequency, intensity, expression style, hostile attribution) are most prominent for you. This can inform whether seeking professional support might be useful and what kind of support might address the specific pattern.

What it cannot do: diagnose an anger disorder (there is no DSM-5 anger disorder as a standalone category, though intermittent explosive disorder, irritable depression, and several personality disorders involve anger dysregulation); replace a clinical assessment; or provide accurate percentile comparisons against the general population. Online test scores should be treated as directional rather than definitive.

Anger and ADHD

Emotional dysregulation — including anger — is among the most impairing but least recognised features of ADHD. Research by Barkley and colleagues has consistently documented that adults with ADHD report significantly higher anger frequency, intensity, and difficulty regulating anger than neurotypical adults. The mechanism is executive — anger regulation requires inhibitory control to pause between trigger and response, and inhibitory control is specifically impaired in ADHD.

If anger difficulties are a significant concern and you have ADHD, treating the ADHD often improves emotional regulation. ADHD-adapted CBT with an emotional regulation component, and in some cases, guanfacine or other medications that specifically target emotional impulsivity in ADHD, are evidence-based options to discuss with a clinician. For more on emotional regulation in ADHD, see our article on ADHD and executive function.

Dr. Adeel Sarwar, PhD, is a mental health professional specialising in a broad spectrum of psychological conditions such as depression, anxiety, ADHD, eating disorders, and obsessive-compulsive disorder (OCD). Armed with years of experience and extensive training in evidence-based therapeutic practices, Dr. Sarwar is deeply committed to delivering empathetic and highly effective treatment.