Assessment & Research

Diagnostic Criteria for Psychiatric Disorders for Use with Adults with Learning Disabilities/Mental Retardation (DC-LD) and psychiatric phenotypes.

Clarke (2003) · Journal of intellectual disability research : JIDR 2003
★ The Verdict

DC-LD offers sharper psychiatric labels for adults with ID, but broader criteria need a reality check against older systems.

✓ Read this if BCBAs who write diagnostic summaries or sit on intake teams for adults with intellectual disability.
✗ Skip if Clinicians who only serve typically developing children or use purely medical referral routes.

01Research in Context

01

What this study did

Clarke (2003) looked at a new checklist called DC-LD. The checklist helps doctors name mental health conditions in adults with learning disabilities.

The paper is a narrative review. That means it sums up expert opinion instead of running new experiments.

02

What they found

The author says DC-LD gives clearer labels for psychiatric phenotypes. Clear labels can guide treatment and staff training.

No numbers are reported; the claim is based on expert logic.

03

How this fits with other research

O'Brien (2003) extends the same idea. Gregory shows how DC-LD adds a new code for severe problem behavior. Together the two papers say, "Use DC-LD for both general and behavior-only cases."

Najdowski et al. (2003) also extends the idea. They apply DC-LD to ADHD in the same adult group. Their message: the checklist can catch ADHD that older tools missed.

Dewsbury (2003) contradicts the praise. That paper warns DC-LD psychosis criteria are wider than ICD-10. The author says test the new criteria against old ones before you trust them.

Iwata (1993) is the predecessor. It paints the messy picture DC-LD tries to fix: no shared language, little guidance. Clarke (2003) answers that call with the new checklist.

04

Why it matters

If you assess adults with ID, DC-LD gives you a shared short-hand. It can unlock specialized services and make reports clearer to doctors, funders, and courts. Still, heed Dewsbury (2003): compare DC-LD with ICD-10/DSM in your own files before you swap systems.

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Pull one current case, map its behaviors to both DC-LD and your usual ICD-10 codes, and note any new labels or gaps you see.

02At a glance

Intervention
not applicable
Design
narrative review
Population
intellectual disability
Finding
not reported

03Original abstract

BACKGROUND: The concept of behavioural phenotypes is reviewed, with emphasis on the need to research reasons for heterogeneity. METHODS/RESULTS: The classification of emotional, behavioural, linguistic and cognitive abnormalities associated with genetic disorders may be improved through the use of the Diagnostic Criteria for Psychiatric Disorders for Use with Adults with Learning Disabilities/Mental Retardation. CONCLUSIONS: Examples of such abnormalities are discussed, showing how more accurate descriptions can result in improved diagnosis and treatment.

Journal of intellectual disability research : JIDR, 2003 · doi:10.1046/j.1365-2788.47.s1.7.x