Concurrent Validity of the ABAS-II Questionnaire with the Vineland II Interview for Adaptive Behavior in a Pediatric ASD Sample: High Correspondence Despite Systematically Lower Scores

J Autism Dev Disord. 2021 May;51(5):1417-1427. doi: 10.1007/s10803-020-04597-y.


We examined the correlation between interviewer-administered Vineland Adaptive Behavior Scale II (VABS-II) and the parent-rated Adaptive Behavior Assessment System II (ABAS-II) questionnaire in 352 participants (ages 1.5-20.8 years) with autism spectrum disorder (ASD) to determine if ABAS could be used as a screen to reduce the number of VABS interviews. Corresponding domain scores between the two measures were highly correlated but scores were significantly lower on the ABAS-II. Screening with ABAS-II significantly reduced the number of VABS-II interviews required with little cost to overall accuracy. The ABAS-II provides a cost- and time-saving alternative to the VABS-II to rule out functional impairment; however, scores are not strictly comparable between the two measures.

Keywords: ABAS; Adaptive behaviors; Autism spectrum disorder; Children; Vineland.

MeSH terms

  • Activities of Daily Living / psychology
  • Adaptation, Psychological* / physiology
  • Adolescent
  • Autism Spectrum Disorder / diagnosis*
  • Autism Spectrum Disorder / psychology*
  • Behavior Rating Scale / standards*
  • Child
  • Child, Preschool
  • Female
  • Humans
  • Infant
  • Interview, Psychological / standards*
  • Male
  • Parents / psychology
  • Reproducibility of Results
  • Surveys and Questionnaires / standards*
  • Young Adult