主観的輪郭を持つ立体文字の認知に及ぼす陰影の位置の効果

概要

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Seventeen students were required to perform visual search task to examine how shading affected letter recognition. The stimulus display consisted of eight letters with a subjective outline arranged equidistantly in an imaginary circle. The letters were M, O, or R with shading in the positions of BOTTOM, LLEFT (lower left), LEFT, ULEFT (upper left), TOP, URIGHT (upper right), RIGHT, and LRIGHT (lower right). The RT was measured for determining whether or not a stimulus display contained a target letter with shading in a different position from the distractor letters. The RT for M and O was shortest when distradctors were shaded in LRIGHT or ULEFT position for the target condition and when all the letters were shaded in LRIGHT or ULEFT position. The RT for R was shortest when all the letters were shaded in LRIGHT, BOTTOM, or LLEFT positions. The results indicated that a shading in LRIGHT position help the letter to be recognized.
2006-03-05