One Back Test

Cognitive Domain: Working Memory

Administration Time: 4 Minutes (for healthy participants)

Outcome Measures: Speed of performance (mean of the log10 transformed reaction times for correct responses); Accuracy of performance (arcsine transformation of the square root of the proportion of correct responses).

“Is the previous card the same?”

Test Description

The One Back test measures working memory using an n-back paradigm. The on-screen instructions ask: “Is the previous card the same?”. A playing card is presented face up in the center of the screen. The participant must decide whether the card is the same as the previous card. If the card is the same the participant should press “Yes”, and if it is not the same the participant should press “No”. The participant is encouraged to work as quickly as they can and be as accurate as possible.