One Card Learning Test
The One Card Learning Test uses a pattern separation paradigm to measure visual memory.
Administration Time (in healthy volunteers): 6 Minutes
Cognitive Domain Measured: Visual Learning
One Card Learning Test Description
The pre-test on-screen instructions ask: “Have you seen this card before in this test?” 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. As soon as it does the subject must decide whether or not the same card has been seen before in this test. Therefore the first answer is always “No”.
Each time a card is revealed, the subject must decide whether he/she has been shown that card before in this test and respond by pressing the “Yes” or “No” key. If an incorrect response is given (e.g. “No” is pressed when a card has been presented before) an error noise is heard. Once the practice is complete (required number of responses or time out reached) the on-screen instructions and the test supervisor will tell the subject that the real test will now begin. 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 possible. For example, the subject should try not to press either the “Yes” or the “No” key before a card turns over, and the subject should try and remember all the cards that are presented in this test. If the subject makes a mistake he/she will hear an error sound.
Primary Outcome measure
Unit of measurement: Arcsine proportion correct
Description and interpretation of scores: Accuracy of performance; arcsine transformation of the square root of the proportion of correct responses. (Higher score = better performance)