The Flanker Task A Demonstration

What you’re about to see is a quick depiction of how the Flanker Task was conducted. Each subject participated in the experiment in blocks of 32 trials. The subject was asked to first focus their attention on a fixation point, affixed a ½ degree below the target letter yet to be presented, and after a delay of 1 second, the target letter appeared, either alone or with a series of “flanker” letters. The subject was asked to identify whether the target letter was an H or K, S or C, by pressing a left or right lever. The subjects’ responses were timed, and upon the identification of the target letter, a new trial would begin.

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S ●

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C ●

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H ●

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K ●

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SSSSSSS ●

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CCCCCCC ●

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KKKKKKK ●

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HHHHHHH ●

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SSSCSSS ●

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KKKCKKK ●

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HHHSHHH ●

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CCCHCCC ●

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SSSKSSS ●

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WWWSWWW ●

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JJJKJJJ ●

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GGGHGGG ●

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MMMCMMM ●

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NNNSNNN ●

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SSSCSSS ●

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HHHKHHH ●

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CCCSCCC ●

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KKKHKKK ●

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CCCCCCC ●

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GGGHGGG ●

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SSSKSSS ●

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KKKCKKK ●

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MMMSMMM ●

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HHHHHHH ●

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GGGKGGG ●

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QQQSQQQ ●

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NNNKNNN ●

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GGGCGGG ●