Spatial interval discrimination in the presence of flanking lines
Spatial interval discrimination in the presence of flanking lines
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DOI：
10.1163/156856899x00148
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发表时间：
1999-01-01
期刊：
影响因子：
--
通讯作者：
Danilova, MV
中科院分区：
文献类型：
--
作者：
Bondarko, VM;Danilova, MV
空间间隔的歧视进行了研究，在不存在或存在的干扰。在后一种情况下，两条侧翼线围绕着两条垂直线，划定了空间间隔。使用时间2AFC技术与方法的恒定刺激，我们测量的准确性的性能（歧视阈值）和偏见（点的主观平等）取决于目标和侧翼线之间的分离。对于小于或相当于空间间隔的大小的分离，我们发现精度降低和空间间隔的感知大小增加：辨别阈值增加，空间间隔的大小被高估。对于较大的分离，空间间隔的大小被低估，但性能的精度不受侧翼线的存在。我们讨论了侧翼线存在下的空间间隔歧视的可能机制。
Spatial interval discrimination was studied in the absence or presence of distracters. In the latter case, two flanking lines surrounded two vertical lines delimiting the spatial interval. Using a temporal 2AFC technique with a method of constant stimuli we measured the accuracy of performance (discrimination thresholds) and biases (points of subjective equality) depending on the separations between the target and the flanking lines. For separations less than or comparable to the size of the spatial interval we found both a reduction of precision and the increase of perceived sizes of the spatial intervals: the discrimination thresholds were increased, the size of the spatial interval was overestimated. For larger separations, the size of the spatial interval was underestimated, but the precision of performance was not affected by the presence of flanking lines. We discuss the possible mechanisms underlying spatial interval discrimination in the presence of flanking lines.