DID Test (Dissociative Identity Disorder)

A DID test screens for dissociative symptoms using the Dissociative Experiences Scale (DES-II). DID is characterized by distinct identity states, amnesia, and trauma-related dissociation. Diagnosis requires full psychiatric evaluation. Bernstein & Putnam (1986).

What is DID and How is it Assessed?

Dissociative Identity Disorder (DID) is a complex dissociative disorder characterized by the presence of two or more distinct personality states (alters), recurrent gaps in memory for everyday events and personal information, and significant distress or impairment in daily functioning. DID is classified under Dissociative Disorders in DSM-5-TR (300.14).

DID is strongly linked to severe, repeated early childhood trauma. It is understood as a complex adaptation to overwhelming trauma in which the developing mind compartmentalizes experiences into separate identity states. Research supports a prevalence of approximately 1% in the general population, with Sar et al. (2007) identifying DID in 1.1% of a community sample of women and Dorahy et al. (2014) placing general-population rates at around 1% based on a review of epidemiological studies. The disorder is frequently misdiagnosed or goes unrecognized for years before correct diagnosis.

The criterion standard for diagnosis is the SCID-D (Structured Clinical Interview for DSM-5-TR Dissociative Disorders), a full clinician-administered interview. The Dissociative Experiences Scale (DES), originally developed by Bernstein and Putnam (1986), is the most widely used screening tool — a 28-item self-report scale measuring the frequency of dissociative experiences. The revised DES-II format scores items on a 0–100 scale; the mean across all 28 items is the DES score. A cutoff of 30 was validated as a screening threshold in a multicenter study by Carlson et al. (1993), yielding sensitivity of 76% and specificity of 76–85%. However, elevated DES scores are not specific to DID and can reflect other dissociative or trauma-related conditions such as PTSD, borderline personality disorder, and acute stress disorder.

DES-II Score Interpreter

Enter your DES-II average score (0–100) to interpret dissociation severity. The DES-II score is the mean of all 28 item scores, each rated 0–100.

Each item asks what percentage of time (0–100%) a dissociative experience occurs. Sum all 28 responses ÷ 28 = DES score.

DES-II © Carlson & Putnam (1993). Available for research and clinical use. A DES-II score alone cannot diagnose DID or any dissociative disorder; diagnosis requires full clinical evaluation including the SCID-D. If you are experiencing dissociative symptoms, please consult a trauma-informed mental health professional.

DES-II Score Reference

Bernstein & Putnam (1986); Carlson et al. (1993). DES-II norms vary across clinical and general population samples. Scores must be interpreted in clinical context with structured diagnostic interview.

Score Interpretation

The table below summarizes the score ranges that are commonly used in clinical settings, based on the multicenter validation by Carlson et al. (1993) and general-population norms from multiple studies. These are screening guides, not diagnostic thresholds.

DES-II subscale domains:

The DES yields three subscale scores corresponding to amnesia, depersonalization/derealization, and absorption. Dubester & Braun (1995) reported test-retest reliability of r = .93 for total DES scores and demonstrated temporal stability across subscales in a clinical sample. Scores are not normally distributed in community samples, so parametric comparisons should be interpreted cautiously.

DSM-5-TR DID Diagnostic Criteria

Diagnosis of DID under DSM-5-TR (APA, 2022) requires all five of the following criteria:

Criterion A — Disruption of identity. The individual experiences disruption of identity characterized by two or more distinct personality states (in some cultures described as an experience of possession). Each state involves a marked discontinuity in sense of self and agency, accompanied by related changes in affect, behaviour, consciousness, memory, perception, cognition, and sensory-motor functioning. These disruptions may be observed by others or reported by the individual.

Criterion B — Recurrent amnesia. The individual experiences recurrent gaps in recall for everyday events, important personal information, and/or traumatic events that are inconsistent with ordinary forgetting.

Criterion C — Distress or dysfunction. The symptoms cause clinically significant distress or impairment in social, occupational, or other important areas of functioning.

Criterion D — Not a cultural or religious practice. The disruption is not a normal part of a broadly accepted cultural or religious practice.

Criterion E — Not substance or medical. The symptoms are not attributable to the physiological effects of a substance (e.g., blackouts during alcohol intoxication) or another medical condition (e.g., complex partial seizures).

DSM-5-TR also requires clinicians to assess the level of distress associated with identity disruption and whether the individual has awareness of the alternate identity states, as many individuals with DID have limited or no conscious awareness of their alters. The diagnosis falls under the broader DSM-5-TR category of Dissociative Disorders (300.14 / F44.81).

Dissociative Disorders Spectrum

Dissociation exists on a spectrum from normal (highway hypnosis, daydreaming) to pathological. DSM-5-TR dissociative disorders include five diagnoses.

DID sits at the severe end of the spectrum and is distinguished from OSDD primarily by the completeness of identity disruption and the severity of amnesia between states.

Dissociation Assessment Tools

Clinicians and researchers use several complementary instruments to assess dissociation, each suited to different assessment contexts. The DES-II is the most commonly used screener, while the SCID-D is the criterion-standard diagnostic interview.

The SCID-D-R systematically evaluates five core dissociative symptom clusters — amnesia, depersonalization, derealization, identity confusion, and identity alteration — and assigns severity ratings for each cluster. Studies across multiple countries have found good-to-excellent reliability and validity for the SCID-D-R (Steinberg, 2000).

Treatment Approaches

Evidence-based treatment for DID is phase-based trauma therapy: Phase 1 (safety, stabilization, symptom management), Phase 2 (trauma processing with EMDR or modified CPT), Phase 3 (integration and rehabilitation). Leading approaches include the ISSTD (International Society for the Study of Trauma and Dissociation) Treatment Guidelines (2011). Treatment is typically long-term but outcomes are generally positive with skilled, trauma-informed care. Many individuals with DID achieve significant symptom reduction and improved daily functioning.

Trauma & Dissociation Outcome Monitoring

PCL-5, DES-II, PHQ-9, and trauma-specific outcome measures, integrated trauma and dissociation monitoring for complex PTSD and dissociative disorder programs.