Lack of Decision-making in Patients With Alzheimer's Disease : Functions Involved and the Daily Consequences

"* MMSE : Mini-Mental State Examination~* 5 words of Dubois~* Direct Assessment of Functional Status~* Trail Making Test~* BREF : Fast Front End Efficiency Battery~* short battery of praxies~* Quality of Life in Alzheimer's Disease"

"* Stroop Victoria : This test consists of 3 sheets of 24 items, organized in 6 lines of 4 (points, neutral words or names of colours), from which the subject must identify the ink of the stimuli as quickly and precisely as possible.~* Stop Signal task on the computer to give a response to the presentation of a target stimulus (Go signal) (e.g. pressing a button when a red circle appears on the screen, but doing nothing when a blue triangle appears), and prevent this response when the stimulus is followed or preceded by a beep (stop signal) (e.g. the appearance of a red circle is immediately preceded or followed by a beep, the subject should not press the button)."

"* a letter-number pair task. The subject sees 4 blocks of 48 letter-number pairs appear successively on a screen. When the pair appears at the top, the subject must make a parity judgment but when the pair appears at the bottom, the subject must make a consonant / vowel judgment.~* a category change task, which consists in classifying a word according to one category or another according to a visual clue that appears. The task consists of 4 blocks of 48 stimuli."

"* an update span task for which letters appear on a screen sequentially, and subjects must memorize the last three, without knowing the length of the list. The task will consist of 3 tests of training and then 20 tests. After three errors consecutive, the task ends.~* an n-back task that consists of a sequential presentation of letters, during which the subject must indicate when the stimulus. The task consists of 3 levels, with n = 1, n= 2 or n = 3. For level 1 (with n = 1), the subject must press a button when the same letter appears twice in a row on the screen. This task consists of 75 letters."

"* the empan baba task, which mainly involves maintaining information, and which consists in retaining a series of letters, appearing sequentially on a screen, and whose latency time between two word presentations is required for a secondary task: the repetition of baba syllables.~* the task of reading operations which consists in recalling operations series of letters whose presentation is interspersed with the reading aloud of simple operations and of their results.~* the ongoing operational task of recalling a list of letters, the presentation of which is interspersed with operations that are simple to read aloud and to to solve head-on."

\- A recognition task with a Remember/Know paradigm