Institute of Physiology, Academy of Sciences of the Czech Republic, Videnska 1083, 14220 Prague 4, Czech Republic.
Sci Rep. 2016 Mar 29;6:23810. doi: 10.1038/srep23810.
Sensory neurons are often reported to adjust their coding accuracy to the stimulus statistics. The observed match is not always perfect and the maximal accuracy does not align with the most frequent stimuli. As an alternative to a physiological explanation we show that the match critically depends on the chosen stimulus measurement scale. More generally, we argue that if we measure the stimulus intensity on the scale which is proportional to the perception intensity, an improved adjustment in the coding accuracy is revealed. The unique feature of stimulus units based on the psychophysical scale is that the coding accuracy can be meaningfully compared for different stimuli intensities, unlike in the standard case of a metric scale.
感觉神经元通常被报道能够根据刺激统计数据调整其编码准确性。观察到的匹配并不总是完美的，最大的准确性也与最常见的刺激不一致。作为对生理解释的替代，我们表明匹配取决于所选择的刺激测量尺度。更一般地说，我们认为如果我们在与感知强度成正比的尺度上测量刺激强度，则会显示出编码准确性的改善调整。基于心理物理尺度的刺激单位的独特之处在于，与度量尺度的标准情况不同，可以对不同的刺激强度进行有意义的编码准确性比较。
