Effects of feature similarity and discrimination category in a flanker task

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  • フランカー課題における特徴類似性と弁別カテゴリーの影響
  • フランカー カダイ ニ オケル トクチョウ ルイジセイ ト ベンベツ カテゴリー ノ エイキョウ

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Three experiments were conducted to investigate the effects of feature similarity and discrimination category in a flanker task. Gabor patches were used as target and distractor stimuli for each experiment. In the first experiment, the target turned to minus or plus 45 deg from the vertical, whereas the orientation of the distractors changed between minus and plus 45 deg by 15 deg. For the second experiment, three conditions of the target orientation were used: minus or plus 45 deg, minus 22.5 deg or plus 67.5 deg, and 0 deg or plus 90 deg. The orientation of the distractors changed between the orientations of the two targets by 22.5 deg. In the third experiment, the target turned to minus or plus 10 deg from the vertical, whereas the orientation of the distractors changed between minus and plus 40 deg by 5 deg. The results showed that responses to the target were affected by the difference between the orientations of the target and the distractors as well as the category of their orientations.

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