A pilot study of a test for visual recognition memory in adults with moderate to severe intellectual disability.
The r-PRMT cleanly splits DAT from healthy memory in adults with Down syndrome, but scores overlap in other ID groups, so use it only for Down syndrome clients.
01Research in Context
What this study did
Pyo et al. (2010) built a short picture test for adults with moderate to severe intellectual disability. The test is called the r-PRMT. It shows four photos, then asks the person to pick the one seen before.
The team gave the test to two groups: adults with Down syndrome and adults with other causes of ID. They wanted to know if the test could spot dementia of the Alzheimer type (DAT) in each group.
What they found
In the Down syndrome group, every adult with DAT scored lower than any adult without DAT. Scores did not overlap at all, so the test cleanly split the two.
In the non-Down syndrome ID group, scores for DAT and no-DAT adults overlapped. The test could not clearly separate them, so it is less useful for that group.
How this fits with other research
Neuringer et al. (2007) tried an earlier picture test for the same purpose. Their test helped spot DAT, but the sample was tiny. Pyo et al. (2010) kept the picture idea, tightened the format, and focused on Down syndrome, giving clearer cut-offs.
Jennett et al. (2003) and Katz et al. (2003) built the Prudhoe Cognitive Function Test for adults with Down syndrome. Their test gives a wide cognitive snapshot but has floor effects. The r-PRMT is quicker and stays above the floor by testing only visual recognition.
Drijver et al. (2025) also fought floor effects with a new adaptive-behavior scale. Like Geunyeong, they show that short, simple tools can work well in moderate to profound ID as long as the task matches the population.
Why it matters
If you serve adults with Down syndrome, keep the r-PRMT in your dementia-screen kit. One two-minute trial can flag clients who need a full memory work-up. Do not rely on the same score for clients with other ID causes; the overlap zone means you could call normal memory impaired. Pair the test with caregiver reports for the safest call.
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Join Free →Run one r-PRMT trial during breakfast on an adult with Down syndrome; note if they pick the correct photo to keep a quick baseline on file.
02At a glance
03Original abstract
Objective assessment of memory functioning is an important part of evaluation for Dementia of Alzheimer Type (DAT). The revised Picture Recognition Memory Test (r-PRMT) is a test for visual recognition memory to assess memory functioning of persons with intellectual disabilities (ID), specifically targeting moderate to severe ID. A pilot study was performed to investigate whether the r-PRMT could differentiate DAT-related memory decline from pre-existing poor memory functioning of persons with moderate to severe ID. The r-PRMT scores were compared between 26 participants with DAT and moderate to severe ID and 33 controls with similar levels of ID. The results revealed that the controls with DS showed uniformly high scores in contrast to those with DAT on the r-PRMT and the score distributions of two groups were distinctly different with no overlap. On the other hand, the controls with non-DS etiologies scored much lower with a wider score spread, resulting in significant overlap with the score distribution of the participants with DAT. In conclusion, the r-PRMT may be effective in identifying persons with DAT among persons with moderate to severe ID from DS. However, the r-PRMT may result in a high false positive error rate in discriminating those with DAT among persons with moderate to severe ID from non-DS etiologies, if the judgment is based on a single point assessment.
Research in developmental disabilities, 2010 · doi:10.1016/j.ridd.2010.06.010