Table 1.

Summary of ADAS-cog tasks

Task	Description	Scoring
Word Recall	A list of 10 words is read by the subject, and then the subject is asked to verbally recall as many of the words as possible. Three trials of reading and recalling are performed.	Mean number of words not recalled across the three trials; scoring range is 0 to 10.
Naming Objects and Fingers	The subject is asked to name the fingers of their dominant hand as well as twelve objects: flower (plastic), bed (doll house furniture), whistle, pencil, rattle, mask, scissors, comb, wallet, harmonica, stethoscope, and tongs.	The number of fingers and objects correctly named; scoping range is 0 to 4.
Commands	The subject is asked to perform commands that involve one to five steps. For example, the two-step command is to “Point to the ceiling, then to the floor.”	Scored from 0 to 5 based on the largest number of steps that are correctly performed (score is 0 if five step command is correctly performed).
Constructional Praxis	The subject is shown four geometric forms (circle, two overlapping rectangles, rhombus, cube) and asked to copy them on a piece of paper.	Scored from 0 to 5 based on the number of correctly drawn forms.
Ideational Praxis	The subject is asked to pretend to send a letter to themselves: fold letter, put letter in envelope, seal envelope, address envelope, and put a stamp on the envelope.	Scored from 0 to 5 based on difficulty of performing the five components.
Orientation	The subject is asked the date, month, year, day of the week, season, time of day, place, and person.	The number of correct responses; scoring range is 0 to 8.
Word Recognition	The subject reads twelve words aloud, and then these twelve words are randomly shuffled with twelve new words, and the subject is asked whether they have previously seen each of the twenty-four words. Three trials are performed.	Mean number of correct responses across the three trials; scoring range is 0 to 12.
Language	After the administration of the Word Recall task (Q1) ten minutes of open-ended conversation occur between the test administrator and subject, before the remainder of the tasks are presented. These ten minutes of conversation are used to assess language ability.	Quality of speech is given a global rating by the administrator that ranges from 0 to 5.
Comprehension of Spoken Language	This task also relies on the ten minutes of open-ended conversation. The administrator provides an assessment of how well the subject can understand speech.	The administrator provides a score from 0 to 5.
Word Finding Difficulty	During the aforementioned open-ended conversation, the administrator assesses how much difficulty the subject has in finding desired words.	The administer provides a score from 0 to 5.
Remembering Test Instructions	The administrator provides an assessment according to the number of times that the subject needed to be reminded of instructions for the Word Recognition task.	The administrator provides a score from 1 to 5.