Bennett R G, Westheimer G
Department of Molecular and Cell Biology, University of California, Berkeley 94720.
Percept Psychophys. 1991 Jun;49(6):541-6. doi: 10.3758/bf03212188.
The effect of training on an observer's ability to detect the misalignment of three points, a hyperacuity, and to resolve a six-line grating was studied in a transfer-of-training design with observers (4 in each of two experiments) who were experienced in making psychophysical judgments of other visual stimuli. The transfer-of-training design enabled us to look for any training-based improvement. Long periods of training produced no statistically significant improvement in performance under any condition. There were small practice-based improvements, but the primary patterns indicated threshold fluctuation rather than improvement. We interpret the results to indicate that the neural mechanisms underlying three-point alignment and grating discrimination, like those for gap bisection (Klein & Levi, 1985), are not malleable to any significant extent.
在一项训练迁移设计中，我们研究了训练对观察者检测三点未对齐（一种超敏锐度）以及分辨六线光栅能力的影响。实验中有两组观察者（每组4人），他们在对其他视觉刺激进行心理物理学判断方面经验丰富。训练迁移设计使我们能够探寻基于训练的任何改进。在任何条件下，长时间的训练在表现上都没有产生统计学上显著的提高。存在基于练习的小幅度改进，但主要模式表明是阈值波动而非提高。我们将这些结果解释为，三点对齐和光栅辨别背后的神经机制，与间隙二等分的神经机制一样（Klein & Levi，1985），在很大程度上是不可塑的。
