Cues and distractors.
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资源简介：
The nine letters used from the Snellen set are shown paired with their three distractors. Each letter appears in the table once as a cue, and three times as a distractor. Each trial uses one of the cues and one of the three distractors associated with that cue. Distractors were selected to match cues in identification difficulty, and to form a closed, balanced set. The letter recognition paradigm involves a total of twenty seven randomly presented alternative choice combinations.
创建时间：
2015-12-02
