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Go/NoGo - TAP 2.3.1

An important aspect of behavioural control is the ability to perform an appropriate reaction under time pressure and to simultaneously inhibit an inappropriate behavioural response. The Go/Nogo paradigm was developed to test this form of behavioural control, in which it is important to suppress a reaction triggered by an external stimulus to the benefit of an internally controlled behavioural response. In this paradigm, the focus of attention is directed to predictably occurring stimuli that require a selective reaction, that is, to react or not to react.

A deficit in this form of behavioural control is particularly seen in patients with a frontal symptomatic. These patients frequently show above-average reaction speeds in simple reaction tasks, where as in a Go/Nogo task they show either a much higher number of incorrect reactions, or much higher reactions times compared with the simple reaction task. The latter deficit is indicative of difficulties in decision processing in the control of behaviour. Investigations with imaging techniques have provided evidence for the role played by frontal structures in executing a Go/Nogo task.

Two administrative forms of this test may be administered.
Test Form "1 of 2" (1 of the 2 stimuli is critical): an up-right ("+") and a diagonal ("×") cross are presented in an alternating sequence on the screen.
Test Form "2 of 5" (2 critical stimuli amongst 5 stimuli): A sequence of five squares with different patterns appears on the screen. Two of these squares are defined as target stimuli.

Screenshot of the subtest "Go/Nogo" der TAP 2.3

The instruction screen of the subtest "Go/Nogo, 2 stimuli, 1 target" of TAP 2.3 (to get a larger view (1024*768) - opening in a new browser window - please click on the image)

Execution time: 1. Condition: 2 minutes
2. Condition: 2,75 minutes