DECISION MAKING & RESPONSE TESTS USING

CANTAB

113MN0480

DECISION MAKING TESTS

Cambridge Gambling Task

Affective Go/No-go test

Cambridge Gambling Task

The Cambridge Gambling Task was developed to assess decision-

making and risk-taking behavior.

Administration time is up to 30 minutes.

alcoholism and drug abuse are all conditions sensitive to this test.

Cambridge Gambling TaskTask:

On each trial, the participant is presented with a row of ten boxes across

the top of the screen, some of which are red and some of which are blue.

At the bottom of the screen there will be a red box and a blue box.

The participant must guess whether a yellow token is hidden in a red box

or a blue box.

CGT Task contd…In the second stage a stake box on the screen displays the current

amount of the bet.

The participant has to choose the amount of the bet.

If he wins he will gain that amount else he will lose the same amount

It tells us that how much confident you are on a particular decision

Outcome

CGT outcome measures cover

risk taking

quality of decision making

Confidence levels

Affective Go/No-go testThis test assesses information processing biases for positive

and negative stimuli.

Administration time is 10 minutes.

Task

In this test a word from three different affective categories is

displayed on the screen

Positive (for example, joyful)

Negative (for example, hopeless)

Neutral

Task contdThe participant is given a target category, and is asked to

press the press pad when they see a word matching this

category.

Outcome

Measures errors of commission and omission.

RESPONSE TESTS

Attention Switching Task{AST}

Stop Signal Task{SST}

Attention Switching TaskAST is a test of the participant’s ability to switch attention between

the direction of an arrow and its location on the screen.

Administration time 8 minutes.

TASKThe test displays an arrow which can appear on either side of the

screen (right or left) and can point in either direction (to the right or to

the left).

Task contd..

In each trial the participant is asked to respond by pressing right or left

arrow according to direction or position of arrow.

Task contd..

Some trials display congruent stimuli (e.g. arrow on the right side of the

screen pointing to the right) whereas other trials display incongruent

stimuli which require a higher cognitive demand (e.g. arrow on the

right side of the screen pointing to the left).

Outcome

AST measures

Attention switching ability

Responding ability

STOP SIGNAL TASK {SST}The Cantab SST is a unique version of a classic approach to measuring

response inhibition.

The subject must respond to an arrow stimulus, by touching either of

two choices depending on the direction in which the arrow points.

Administration time is up to 20 minutes

TASKThis test consists of two parts:

In the first part, the participant is introduced to the press pad, and told

to press the left hand button when they see a left-pointing arrow, and

the right hand button when they see a right-pointing arrow.

TASK-Part2

In the second part, the participant is told to continue pressing the

buttons on the press pad when they see the arrows, as before, but, if

they hear an auditory signal (a beep), they should withhold their

response and not press the button.

OUTCOME

SST measures cover

Direction errors

Proportion of successful stops