Concordance of the Vineland Adaptive Behavior Scales, second and third editions.
C Farmer, D Adedipe, V H Bal and 2 others
PMID 31657503WHAT IT FOUND
The new Vineland-3 scores lower than the old Vineland-II in people with developmental disabilities.
The gap widens as ability drops. This can make a patient look two levels more impaired than they did with the old test.
Key findings
01Vineland-3 scores were lower than Vineland-II scores across all domains, with the difference being largest for Communication and smallest for Motor Skills.
02For a patient with a Vineland-II Communication score of 85, the Vineland-3 score was estimated to be about 14 points lower; for a score of 55, it was about 17 points lower.
03Six participants were classified by the Vineland-3 as having adaptive behavior two levels lower than their classification on the Vineland-II.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study used a sample of convenience, so the specific mix of ages and abilities may not represent all clinics. The Motor Skills domain analyses were underpowered because many participants were too old for that subscale. The order in which the tests were given was not randomised, which could affect reliability estimates. The study did not determine which test is more accurate; it only measured the difference between them.
Declared interests
The study was supported by the National Institute of Mental Health, National Institute of Child Health and Human Development, and National Human Genome Research Institute. The authors reported no conflicts of interest.
The easy way to misread this
Do not assume the Vineland-3 is more accurate because it scores lower. The study shows the new test yields lower numbers, particularly for patients with lower ability, but it does not prove which score better reflects the patient's true adaptive function.