The DES-II (Dissociative Experiences Scale): A Clinician Guide

The Dissociative Experiences Scale-II (DES-II) is a 28-item self-report measure of how often a person experiences dissociation in everyday life - moments of feeling disconnected from thoughts, feelings, memory, or surroundings. Developed by Carlson and Putnam (1993), it remains one of the most widely used dissociation screens in trauma-informed clinical practice. This guide covers its unusual percentage-based response format, how the mean score is calculated, its screening cut-off, and where it fits alongside a full clinical interview.

What the DES-II measures

The DES-II measures the frequency of dissociative experiences in daily life - not their severity or distress, but how often they occur. Items span a range of dissociative phenomena, from common and relatively benign experiences (such as driving somewhere and not remembering the trip) to experiences more strongly associated with clinical dissociative disorders (such as not recognising oneself in a mirror, or finding evidence of having done something one has no memory of doing). It is intended for adolescents and adults and takes about ten minutes to complete.

The 28 items and the 0-100% response format

The DES-II uses a distinctive response format: for each item, the respondent indicates what percentage of the time the experience happens to them, in 10% steps from 0% to 100%. This is a wider and more granular response range than the four- or five-point Likert scales used by most self-report instruments, and it is designed to let respondents express frequency more precisely than a simple "never / sometimes / often" categorisation would allow.

How to score the DES-II

The DES-II total is calculated as the mean of all 28 item scores (each already expressed as a 0-100 value), giving a total score that ranges from 0 to 100. This mean-based scoring is worth stating explicitly because it differs from the simple item-sum used by many other screeners: the DES-II total is not "add up 28 raw scores," it is the average percentage across all 28 items, and getting this arithmetic step right matters for producing a comparable score across patients.

DES-II cut-off and interpretation

The published bands are:

• 0-29: Below the dissociative-disorder screening cut-off
• 30-100: At or above the cut-off (30) - further evaluation for a dissociative disorder indicated

The cut-off of 30 comes from Carlson and Putnam's own published scoring guidance rather than being printed directly in every reproduction of the item sheet, and it functions strictly as a screening threshold: a score at or above 30 indicates that further evaluation for a dissociative disorder is warranted, not that one is present. As with all screening cut-offs on this platform, the DES-II supports rather than replaces a full clinical assessment.

DES-II vs a structured clinical interview

The DES-II is fast and easy to administer repeatedly, which makes it well suited to initial screening and monitoring change over time. What it cannot do is establish a dissociative disorder diagnosis - that requires a structured clinical interview specifically designed to assess dissociative symptoms in depth, conducted by a clinician trained in that assessment. In practice, the DES-II is best used as a triage step: patients scoring at or above the screening cut-off are referred on for the more time-intensive interview-based evaluation, rather than every patient receiving the full interview regardless of screening result.

Who administers it, time required, setting

The DES-II is a patient self-report measure appropriate for adolescents and adults, typically taking about ten minutes to complete. It is commonly used in trauma-focused clinical settings, as dissociative experiences are strongly associated with trauma histories, though it can be used as a general screening item in any setting where dissociation is a clinical concern.

Limitations

Because the DES-II measures frequency rather than distress or functional impairment, two patients with the same score can have very different clinical pictures - one troubled by their dissociative experiences, another largely unbothered by them. The percentage-based response format, while more granular than a typical Likert scale, still relies on subjective self-estimation of "how often" something happens, which can be difficult for respondents to judge accurately, especially for dissociative experiences that by definition involve gaps in awareness or memory. Like any self-report measure, it also depends on honest and reflective responding.

Using the DES-II digitally

Digital administration handles the DES-II's less common mean-based scoring automatically - averaging 28 percentage-based items correctly every time, rather than relying on a clinician or administrator to remember that this instrument is averaged rather than summed. The platform applies the 30-point cut-off instantly and flags scores at or above threshold for follow-up, while repeat administrations let clinicians track dissociative frequency over the course of trauma-focused treatment as part of measurement-based care. See automated scoring for more on how this reduces scoring errors.

Key takeaways

• The DES-II has 28 items, each rated in 10% steps from 0% to 100%.
• The total score is the mean of all 28 items, not a simple sum, giving a range of 0 to 100.
• A score at or above 30 indicates further evaluation for a dissociative disorder is warranted.
• It measures frequency of dissociative experiences, not distress or impairment.
• It is a screening tool - diagnosis requires a structured clinical interview, not the DES-II alone.