Burbeck C A
Sensory Sciences Research Laboratory, SRI International Menlo Park, CA 94025.
Vision Res. 1987;27(3):417-27. doi: 10.1016/0042-6989(87)90090-3.
The frequency-channel model and the position, or "local-signs," model that have been proposed to account for hyperacuity (i.e. small-scale relative spatial localization) are examined in the context of large-scale relative spatial localization. As a basis for subsequent experiments, localization accuracy is measured over a large range of object separations, and previous findings that the "Weber fraction for localization" is constant are replicated. The effects on localization accuracy of both high- and low-spatial frequency components in the objects being localized are examined in some detail. Localization accuracy is found not to rely exclusively on either the high- or the low-frequency components. Neither the frequency-channel nor the position hypothesis as defined here is consistent with all of the observed results. However, with a slight modification, the position hypothesis can account qualitatively for all of the observed results, whereas no reasonable modification of the frequency-channel hypothesis appears able to do as well.
在大规模相对空间定位的背景下，研究了为解释超敏锐度（即小尺度相对空间定位）而提出的频率通道模型和位置或“局部信号”模型。作为后续实验的基础，在大范围的物体间距上测量定位精度，并重复了先前“定位的韦伯分数”恒定的发现。详细研究了被定位物体中高空间频率和低空间频率成分对定位精度的影响。发现定位精度并非完全依赖于高频或低频成分。这里定义的频率通道假设和位置假设均与所有观察结果不一致。然而，稍加修改，位置假设就能定性地解释所有观察结果，而频率通道假设似乎无法通过合理修改达到同样效果。
