DID
Abbreviation with 2 meanings
| Stands for | Dissociative identity disorder |
|---|---|
| Meanings | 2 |
| Categories | Medical, Units & Measurements |
| Also written | DiD |
DID has two meanings. It stands for Dissociative identity disorder (mental health & psychiatry) or Difference-in-differences (statistics).
Meanings of DID at a glance
| # | DID stands for | Context |
|---|---|---|
| 1 | Dissociative identity disorder | Medical › Mental Health & Psychiatry |
| 2 | Difference-in-differences | Units & Measurements › Statistics |
1. Dissociative identity disorder
Medical · Mental Health & Psychiatry Abbreviations
Disorder involving two or more distinct personality states or identities, with recurrent gaps in memory for everyday events, personal information or traumatic experiences. It is strongly associated with severe, repeated childhood trauma and is treated with long-term psychotherapy.
Example: DID with frequent amnestic episodes and identity switching; phase-oriented trauma therapy weekly.
Called multiple personality disorder until DSM-IV (1994). Its prevalence and causes remain debated, with some researchers attributing cases to suggestion and media influence. Dramatic portrayals in books and films such as Sybil have shaped public perception. DID is not the same as schizophrenia, which is a psychotic disorder.
2. Difference-in-differences (DiD)
Units & Measurements · Statistics Abbreviations
A method for estimating causal effects by comparing the change in outcomes over time for a treated group with the change for an untreated comparison group. It removes fixed differences between groups and shared time trends.
Example: A DiD analysis comparing New Jersey and Pennsylvania found no job losses after the minimum-wage increase.
David Card and Alan Krueger's 1994 study of fast-food restaurants is the classic example, and Card shared the 2021 Nobel Memorial Prize in Economic Sciences. The key assumption is parallel trends: without treatment, both groups would have changed alike. Recent research shows standard two-way fixed-effects estimates can be biased when treatment timing varies.
Related abbreviations
More mental health & psychiatry abbreviations
- CD – Conduct disorder
- CPT – Cognitive processing therapy
- CUD – Cannabis use disorder
- DBT – Dialectical behavior therapy
- DMDD – Disruptive mood dysregulation disorder
- DSM-5 – Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition
- DTs – Delirium tremens
- ECT – Electroconvulsive therapy
See all 100 mental health & psychiatry abbreviations →
More statistics abbreviations
- CLT – Central limit theorem
- Cov – Covariance
- CV – Coefficient of variation
- df – Degrees of freedom
- DOE – Design of experiments
- EDA – Exploratory data analysis
- EFA – Exploratory factor analysis
- EM – Expectation-maximization
See all 88 statistics abbreviations →
This entry is for general education and is not medical advice. Abbreviation use varies between institutions; always confirm in context.