False Positives vs False Negatives

1:15 PM

(From Greg Nooney material)

Dissociative Identity Disorder (DID) is frequently missed (false negatives)—not because it isn’t present, but because both clients and clinicians inadvertently conceal it.

Why DID Gets Missed

1. Client-Level Factors

Stigma and secrecy: Individuals with DID often hide their dissociation and may not even be fully aware of it.
Distrust: They are unlikely to disclose symptoms unless they feel safe and trust the therapist.
Protective concealment: Dissociation itself functions to avoid awareness of internal experiences, including from clinicians.
Limited overt presentation: Only a small percentage (~6%) of adults with DID show obvious, observable symptoms.

2. Misdiagnosis & Misinterpretation

Clients are sometimes misdiagnosed with schizophrenia when reporting voices.
Some individuals with DID have histories of abuse by therapists or doctors, further reducing disclosure.
In forensic contexts, suspicion of malingering can lead to dismissal of genuine symptoms.

3. Clinician-Level Factors

If a therapist does not believe DID exists, they will not detect it.
If a therapist is not trained or does not ask the right questions, dissociation remains hidden.
If the therapist has not done their own trauma work, clients may sense this and withhold material.

Consequences of False Negatives

DID remains undiagnosed
Treatment is ineffective, especially when dissociation is not addressed
Pharmacological treatments may fail for co-occurring conditions
Clients may drop out of therapy

Big Picture Insight

The document emphasizes that DID is often invisible by design—both neurologically and psychologically. Accurate diagnosis depends heavily on:

Therapist awareness and training
A trusting therapeutic relationship
Intentional, informed assessment of dissociation

Core Idea

Factors that can lead to overdiagnosing DID (false positives)—where symptoms are misinterpreted as alters or dissociative identity phenomena when another explanation is more accurate:

Key Contributors to False Positives

1. Medical Conditions

Brain tumors or neurological issues can produce changes in behavior, perception, or personality that may resemble dissociation.
Medical Rule Outs download

2. Therapeutic / Conceptual Misinterpretations

Inner child work (e.g., IFS-style parts) may be mistaken for distinct alters rather than ego states.

Emotional dysregulation (e.g., in trauma, BPD, or mood disorders) can be misread as identity switching.

3. Psychiatric Differential Issues

Psychotic symptoms (e.g., hearing voices) may be confused with dissociative parts, especially without careful assessment of insight and phenomenology.

4. Sociocultural Influences

Increased social media attention to DID may shape how individuals understand and present their symptoms, sometimes leading to over-identification with the diagnosis.