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- Introduction
Administration Time (in healthy volunteers): 2 Minutes
Cognitive Domain Usually Measured: Psychomotor Function / Speed of Processing
Task Description:
The pre-task on-screen instructions ask: "Has the card turned over?" The test supervisor will read full instructions to the subject from the test supervisor script.
To begin the task, the test supervisor or subject must press the "Enter" key.
A playing card is presented in the center of the screen.
The card will flip over so it is face up. As soon as it does, the subject must press the "Yes" key.
The card will go to the back of the pack and the subject must press the "Yes" key as soon as the next card flips over and so on. The subject will practice until they reach the required number of responses, or until the practice period expires.
Then, on screen instructions for the real test are presented. The test supervisor or subject must press the "Enter" key to begin the real test.
The subject should be encouraged to work as quickly as they can and be as accurate as they can. For example, they should try not to press the "Yes" key before a card flips over. If the subject does this or does not respond to a card that has flipped over in time, they will hear an error sound.
Primary Outcome Measures:
Unit of measurement: Log10 milliseconds
Description and interpretation of scores: Speed of performance; mean of the log10 transformed reaction times for correct responses. (Lower score = better performance)
