The Detection Test uses a simple reaction time paradigm to measure processing speed.
Administration Time (in healthy volunteers): 3 Minutes
Cognitive Domain Measured: Psychomotor Function
Detection Test Description
The pre-test 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 test, 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 he/she reaches 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 he/she can and be as accurate as they can. For example, he/she 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, he/she will hear an error sound.
Primary Outcome Measure
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)