Diagnosis of depression in people with severe/profound intellectual disability.

The team looked at adults with severe or profound intellectual disability. They wanted to see if the Marston 30-item checklist could spot depression.

Each person was rated on the checklist and on DSM-III-R rules. The goal was to check if behavioral signs line up with formal mood criteria.

Scores on the Marston checklist matched the DSM-III-R list for major depression. This means things like social withdrawal or sleep change can act as red flags.

The study says these depressive equivalents are useful, but they must sit next to clinical judgment, not replace it.

Martin et al. (1997) first mapped how classic mood symptoms fade and behavioral signs grow as ID deepens. Imam (2001) gives a tool to capture those signs.

LeBlanc et al. (2003) later found that aggression and self-injury did not cluster with depression in their sample. They tell clinicians to stick to core DSM mood items. The two papers seem to clash, but they looked at different groups and different checklists. Imam (2001) kept the link loose, calling equivalents helpers, not proof.

Matson et al. (2008) widened the idea to older adults using the interRAI ID form and still saw value in behavioral cues. The message across years: use extra signs, yet always pair them with standard criteria and a full clinical picture.

If your client has little or no speech, you cannot rely on I feel sad statements. This paper tells you to watch for clear behavior shifts and record them on a checklist. Bring those data to the psychiatrist or BCBA review, but keep DSM criteria in the center. The takeaway is practical: track sleep, appetite, activity, and social interest every shift; note big drops; share the pattern with the team before assuming depression is the cause.