Cognigram Tests

A rapid and reliable assessment of cognition across numerous disease states.

The Cogstate Brief Battery™ has been used extensively as a rapid and reliable screening assessment in a range of clinical indications, including Alzheimer’s Disease, depression, schizophrenia, AIDS, dementia complex and as a measure of cognitive decline following a mild traumatic brain injury or suspected concussive episode. The Cogstate Brief Battery has also been used widely in the context of measuring cognitive dysfunction relative to healthy groups in both pediatric and adult populations.

Computerized Tests

Detection Test

Cognitive Domain: Psychomotor Function

Outcome Measures: Speed of performance (mean of the log10 transformed reaction times for correct responses).

Test Description

The Detection test measures processing speed using a simple reaction time paradigm. The on-screen instructions ask: “Has the card turned over?”. A playing card is presented face down in the center of the screen. The card flips over so it is face up. As soon as the card flips over the participant must press “Yes”. The participant is encouraged to work as quickly as they can and be as accurate as possible.

Identification Test

Cognitive Domain: Attention

Outcome Measures: Speed of performance (mean of the log10 transformed reaction times for correct responses).

Test description

The Identification test measures attention using a choice reaction time paradigm. The on-screen instructions ask: “Is the card red?”. A playing card is presented face down in the center of the screen. The card flips over so it is face up. As soon as it flips over the participant must decide whether the card is red or not. If it is red the participant should press “Yes”, and if it is not red the participant should press “No”. The participant is encouraged to work as quickly as they can and be as accurate as possible.

One Card Learning Test

Cognitive Domain: Visual Learning

Outcome Measures: Accuracy of performance (arcsine transformation of the square root of the proportion of correct responses).

Test Description

The One Card Learning test measures visual memory using a pattern separation paradigm. The on-screen instructions ask: “Have you seen this card before in this test?”. A playing card is presented face up in the center of the screen and the participant must decide whether they have seen the card before in this test. The participant is encouraged to work as quickly as they can and be as accurate as possible.

One Back Test

Cognitive Domain: Working Memory

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).

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.

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