Durlach N I, Delhorne L A, Wong A, Ko W Y, Rabinowitz W M, Hollerbach J
Percept Psychophys. 1989 Jul;46(1):29-38. doi: 10.3758/bf03208071.
Experiments were conducted on length resolution for objects held between the thumb and fore-finger. The just noticeable difference in length measured in discrimination experiments is roughly 1 mm for reference lengths of 10 to 20 mm. It increases monotonically with reference length but violates Weber's law. Also, it decreases when the subject is permitted to maintain a constant finger span between trials; however, it tends to increase when the nondominant hand is used. As would be expected from studies of other stimulus dimensions in other sense modalities, resolution is considerably poorer in identification experiments than in discrimination experiments. For stimulus sets that cover a broad range (90 mm), the total information transfer is roughly 2 bits; for those that cover a relatively small range (18 mm), it is roughly 1 bit. The data are analyzed and interpreted using analysis techniques and models that have been used previously in studies of audition (e.g., Durlach & Braida, 1969).
针对夹在拇指和食指之间的物体进行了长度分辨实验。在辨别实验中，对于10至20毫米的参考长度，长度上刚刚可察觉的差异约为1毫米。它随参考长度单调增加，但违反了韦伯定律。此外，当受试者在各次试验之间被允许保持恒定的指距时，该差异会减小；然而，当使用非优势手时，它往往会增加。正如在其他感觉模态中对其他刺激维度的研究所预期的那样，识别实验中的分辨能力比辨别实验中的要差得多。对于覆盖较宽范围（90毫米）的刺激集，总的信息传递约为2比特；对于覆盖相对较小范围（18毫米）的刺激集，约为1比特。使用先前在听觉研究中使用过的分析技术和模型（例如，Durlach & Braida，1969）对数据进行分析和解释。
