ERIKSEN FLANKER TASK PDF

Edit In the original test described by Eriksen and Eriksen in , [1] letter stimuli were used. Subjects were instructed to make a directional responses to certain letters, for example a right response to the letters H and K, and a left response to S and C. Each stimulus consisted of a set of seven letters, with the target in the central position. Other variants have used numbers, [2] or colour patches [3] as stimuli. These examples all use an arbitrary mapping between the stimulus and the response. Another possibility is to use a natural mapping, with arrows as stimuli.

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Edit In the original test described by Eriksen and Eriksen in , [1] letter stimuli were used. Subjects were instructed to make a directional responses to certain letters, for example a right response to the letters H and K, and a left response to S and C. Each stimulus consisted of a set of seven letters, with the target in the central position.

Other variants have used numbers, [2] or colour patches [3] as stimuli. These examples all use an arbitrary mapping between the stimulus and the response. Another possibility is to use a natural mapping, with arrows as stimuli. For example, Kopp et al. The flankers could be arrows pointing in the same direction as the target congruent the opposite direction incongruent or squares neutral.

Earlier work had used visual search, [6] but this makes it difficult to separate the effects of distraction from the effects of the search process. In the flanker paradigm, the position of the target is always known—there is no search process. Nonetheless interference still occurs, so it can be studied independently of search mechanisms.

Eriksen and Schultz [7] varied a number of features of the flanker tests, for example the size and contrast of the letters, or the use of forward or backward masking. They proposed a continuous flow model of perception in which information is processed in parallel for different stimulus elements, and accumulates over time until sufficient information is available to determine a response.

More recent work in this area has used neurophysiological measures such as event-related potentials [8] or imaging techniques such as fMRI. For example, Ramaekers et al. The flanker test was considered relevant, because dealing with distracting information is an important part of safe driving.

Both alcohol and the antihistamine cetirizine impaired performance in the test measures, and their effects were additive. The non-sedating antihistamine loratidine had no effect on any of the measures studied. The arrows version of the flanker test has also been evaluated as a method of detecting impairment due to alcohol and drugs in drivers at the roadside.

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Eriksen flanker task

Procedure and method[ edit ] In an Eriksen Flanker Task there are three types of stimuli used: Incongruent, congruent, and neutral stimuli represented by arrows. This is what a participant may see in a standard Eriksen Flanker Task Congruent stimulus- Flankers call for the same response as the target, and may appear identical. Incongruent stimulus- Flanker items call for the opposite response of the target and are represented by different symbols. Neutral stimulus- Flanker items neither call for the same response nor evoke response conflict.

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Flanker task

Further reading Introduction The flanker task , also known as the Eriksen flanker task, was designed in the early s by Eriksen and Eriksen. Like most of the paradigms in this library, it is popular and there are many variants of the original. The basic effect is that when you need to respond to stimuli "flanked" by irrelevant stimuli, the irrelevant stimuli can still affect your response. There is a similarity between other paradigms in which this type of interference from an irrelevant stimulus or stimulus feature occurs like the Stroop task or the Simon task. About this implementation The flanker task here is slightly different from the original flanker task from Eriksen and Eriksen for various practical reasons this version is just a bit easier.

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