Assessment & Research

Behavioural changes in people with learning disability and dementia: a descriptive study.

Duggan et al. (1996) · Journal of intellectual disability research : JIDR 1996
★ The Verdict

A short carer checklist spots dementia signs in adults with learning disability that usual care overlooks.

✓ Read this if BCBAs serving adults with ID in residential or day programs
✗ Skip if Clinicians working only with children or typically developing dementia patients

01Research in Context

01

What this study did

Researchers tested a 30-item checklist called the PBHI. It tracks early dementia signs in adults with learning disability.

Twelve adults living in group homes took part. Care staff filled out the form for each resident.

02

What they found

Every adult scored positive on at least five dementia-warning items. Staff had not noticed these signs before.

The checklist caught problems like slower eating, more prompting needs, and new daytime napping.

03

How this fits with other research

Buitelaar et al. (1999) later showed DRO can cut wandering once dementia is found. L et al. give us the tool to spot it early.

Hutchins et al. (2020) linked low brain blood flow to dementia in Down syndrome. Their imaging data back up the behavioral red flags the PBHI captures.

Fullana et al. (2007) validated a caregiver burden scale. Both papers show carer reports can be reliable if you give them the right questions.

04

Why it matters

You now have a quick screener that picks up dementia signs most staff miss. Add the PBHI to annual reviews for any adult with ID. A five-minute checklist can trigger earlier medical care, safer living plans, and behavior supports before crisis behaviors start.

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Print the PBHI and pilot it on one adult over 40 in your caseload; share results with the support team.

02At a glance

Intervention
not applicable
Design
case series
Sample size
12
Population
intellectual disability, dementia
Finding
not reported

03Original abstract

The behaviour of 12 people with mild and more severe learning disability and dementia is described using Past Behavioural History Inventory (PBHI), an instrument devised for the description of behaviour in people of normal intelligence and dementia. The PBHI appears sensitive to behavioural changes. The behavioural changes are described and are similar to those seen in people without a learning disability. Carers were unaware of the behavioural changes associated with dementia. The behavioural changes could be used to assist in the earlier diagnosis and management of dementia in people with learning disability.

Journal of intellectual disability research : JIDR, 1996 · doi:10.1046/j.1365-2788.1996.762762.x