Disability Assessment for Dementia (DAD)

Developed by Gelinas, the Disability Assessment for Dementia (DAD) evaluates the basic and instrumental activities in daily activities of elderly people with dementia.  The proxy-respondent scale specifically measures daily living tasks in terms of executive functions.

A 40-item scale is part of the DAD  which addresses a range of functional domains:  eating, meal preparation, telephoning, hygienic, dressing, medication, corresponding, finance, leisure, and housework.  Approximately 15-20 minutes to administer.

request a consultation

Discover How We Assist to Edit Your Dissertation Chapters

Aligning theoretical framework, gathering articles, synthesizing gaps, articulating a clear methodology and data plan, and writing about the theoretical and practical implications of your research are part of our comprehensive dissertation editing services.

  • Bring dissertation editing expertise to chapters 1-5 in timely manner.
  • Track all changes, then work with you to bring about scholarly writing.
  • Ongoing support to address committee feedback, reducing revisions.


Isabelle Gélinas

Reliability and Validity

Established clinical as a measure for dementia, the DAD has strong reliability.  Internal Consistency Coefficient is reported at 0.96, the intraclass correlation reported at 0.96, and the test-retest reliability also has excellent ratings (Gelinas, 2000).  The convergent validity for the DAD is supported through the instrument’s correlation with such psychometric measure as the Global Deterioration Scale (Gelinas, 1999).  Several experiments have been carried out with the DAD evaluating moderate to sever impairment (Blesa, 2003; Feldman, 2001; Feldman, 2003; Raskind , 2000; Wilcock, 2000)

Obtaining the DAD

Dimentia Collaborative Research Centres

Administration, Analysis and Reporting

Statistics Solutions consists of a team of professional methodologists and statisticians that can assist the student or professional researcher in administering the survey instrument, collecting the data, conducting the analyses and explaining the results.

For additional information on these services, click here.


Gelinas, I., Gauthier, L. & McIntyre, M. (1999) Development of a functional measure for persons with Alzheimer’s disease: the Disability Assessment for Dementia. American Journal of Occupational Therapy, 53, 471-481.

Hodkinson, H. (1972) Evaluation of a mental test score for assessment of mental impairment in the elderly. Age and Ageing, 1, 233-238

Hughes, C. P., Berg, L., Danziger, W. L., et al (1982) A new clinical scale for the staging of dementia. British Journal of Psychiatry, 140, 566-572

Teunisse, S., Derix, M. M. & van Crevel, H. (1991) Assessing the severity of dementia. Archives of Neurology, 48, 274-277


Feldman, H.; Sauter, A.; Gelina, I.; Gauthier, S.; Torfs, K.; Parys, W.; Mehnert, A. (2001).  The Disability for Dementia Scale: a 12-Month Study of Functional Ability In Mild to Moderate Severity Alzheimer Disease.  Alzheimer disease and Associated Disorders, Vol. 15, Issue 2, pp 89-95.

Wilcock, Gordon K.; Lilenfeld, Sean; Gaens, Els (2000).  Efficacy and safety of galantamine in patients with mild to moderate Alzheimer’s disease: multicentre randomized controlled trial.  BMJ, 321: 1445.