Alzheimer's Disease Assessment Scale - ADAS

Technical Manual

Author: Katja Borchert, Ph.D. (katjab@millisecond.com), Millisecond

Created: January 22, 2013

Last Modified: January 17, 2025 by K. Borchert (katjab@millisecond.com), Millisecond

Script Copyright © Millisecond Software, LLC

Background

This script implements the Alzheimer's Disease Assessment Scale (ADAS) as originally described in Rosen et al (1984). The order of the noncognitive items was taken from Mohs & Cohen (1988) and the the word items - if not specified in Rosen et al (1984)- and order of Cognitive Behavior questions were be taken from Schultz et al (2001).

Notes: (1) The main purpose of this script is to help keep track of scoring. For many of these tasks, the evaluation of the patient's responses has to be done by an experienced examiner. (2) The examiner -not the patient- fills out the ADAS based on evaluation of patient (4) Test administration guidelines are provided in Rosen et al (1984). (5) Examiner has options to choose to run the cognitive and noncognitive assessment or only one of the two (-> Editable parameter) (6) Rosen et al (1984) describe many of the scoring scales on a 1(mild)-5(severe) scale without a 0 category (= no impairment). Millisecond added the 0-categories to the scales (see also Mohs & Cohen, 1988).

References

Rosen, W.G, Mohs, R.C & Davis, K.L. (1984). A new rating scale for Alzheimer’s disease. American Journal of Psychiatry, 141: 1356-1364.

Mohs RC & Cohen L (1988). Alzheimer’s Disease Assessment Scale (ADAS). Psychopharmacology Bulletin, 24: 627-628.

Schultz, R.R, Siviero, M.O, & Bertolucci, P.H.F. (2001). The cognitive subscale of the “Alzheimer’s Disease Assessment Scale” in a Brazilian sample. Brazilian Journal of Medical and Biological Research, 34, 1295-1302.

Duration

3 minutes

Summary Data

File Name: adas_summary*.iqdat

Data Fields

NameDescription
inquisit.version Inquisit version number
computer.platform Device platform: win | mac |ios | android
computer.touch 0 = device has no touchscreen capabilities; 1 = device has touchscreen capabilities
computer.hasKeyboard 0 = no external keyboard detected; 1 = external keyboard detected
startdate Date script was run
starttime Time script was started
subjectid Assigned subject id number
groupid Assigned group id number
sessionid Assigned session id number
elapsedtime Time it took to run script (in ms); measured from onset to offset of script
completed 0 = Test was not completed
1 = Test was completed
adasTotalScore Sum of Cogn_Score48, Memory_Score22, NonCogn_Score50
cognScore70 Sum of all cognitive behavior assessment items (Max: 70)
cognScore48 Sum of Cognitive Behavior Assessment scores (minus Memory Scores) (Max: 48)
memoryScore22 Sum of Recall and Recognition Scores (Max: 22)
noncognScore50 Sum of NonCognitive Behavior Assessment scores (Max: 50)
recall - recognition Assigned scores for Cognitive Assessment Scores
tearful- appetite Assigned scores for Non-Cognitive Assessment Scores

Raw Data

File Name: adas.iqdat

Data Fields

NameDescription
date Date the session was run
time Time the session was run
subject Participant ID
group Group number
session Session number
build Inquisit version number
q*_response Response given (in assigned values) to each of the individual survey questions
q*_latency How much time (in ms) the participant spent on the surveyPage with this particular
question (the last time this particular surveyPage was visited)

Parameters

The procedure can be adjusted by setting the following parameters.

NameDescriptionDefault
skipCognAssessment True: skips Cognitive Behavior Assessment Items
false: runs Cognitive Behavior Assessment Items (default)
false
skipNonCognAssessment True: skips NonCognitive Behavior Assessment Items
false: runs NonCognitive Behavior Assessment Items (default)
false