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Type of Measure: Parent- or caregiver-report survey of activities of daily living. Contains 17 items, each item is rated as 0=”does not do”, 1=”does with help”, or 2=”does independently / on own”. Takes approximately 5 minutes

Target Population: Adolescents and adults with intellectual or developmental disabilities (including autism, Down syndrome, fragile X syndrome, and intellectual disability of unknown etiology).

Measurement properties and previous use: The measurement properties of the W-ADL were systematically evaluated (paper) in long-running longitudinal studies of adolescents and adults with Autism, Down syndrome, fragile X syndrome, and intellectual disability of unknown etiology. The evaluation found that the W-ADL met or exceeded a-priori thresholds for content validity, internal consistency, criterion validity, construct validity, reproducibility, responsiveness, floor/ceiling effects, and interpretability.

A poster/handout of the main findings of the paper is also available. Another paper examining longitudinal change in W-ADL scores for individuals with autism and Down syndrome can be found here.

Language: English, but each item is only a few words. Please contact the authors if you are interested in contributing a translated version of the W-ADL.

Authors and Citation: Maenner MJ, Smith LE, Hong J, Makuch R, Greenberg J, Mailick MR. An Evaluation of an Activities of Daily Living Scale for Adolescents and Adults with Developmental Disabilities. Disability and Health Journal. 2013 Jan;6(1):8-17

Licence: Creative Commons Attribution-ShareAlike 3.0 Unported License (others are free to use, copy, and modify the W-ADL. Any modifications must credit the original and be made available under the same license.

Link to measure: Waisman Lifespan Family Research Program:

Corrections or updates? Let us know!