The psychometric properties of the Vineland Adaptive Behavior Scales in children and adolescents with mental retardation.

The team checked if the Vineland Adaptive Behavior Scales give steady scores in kids and teens with intellectual disability.

They tested the children across mild, moderate, severe, and profound levels.

Each child got the same Vineland form twice, two weeks apart, to see if scores stayed the same.

Vineland scores were highly stable; test–retest numbers stayed above 0.90 for every domain.

Construct validity was also strong—scores lined up with clinician ratings of everyday skills.

The tool worked equally well for all severity levels, from mild to profound ID.

Green et al. (2020) now supersedes this work: Vineland-3 gives scores that run 10–20 points lower than Vineland-II for the same person.

So the 2005 “good reliability” still holds, but you must interpret new scores against the lower norms.

Dudley et al. (2019) extends the story to adults, showing IQ and Vineland stay largely independent—keep assessing both.

Dupuis et al. (2021) offers a time-saver: give ABAS-II first; if scores are high you can often skip the longer Vineland interview.

You can trust Vineland numbers to be consistent, but remember the edition matters. If you recently switched to Vineland-3, expect lower scores and adjust your eligibility cutoffs. Pair it with an IQ test and, when possible, screen with ABAS-II to save caregiver time.