Wagar B M, Dixon M J, Smilek D, Cudahy C
Department of Psychology, University of Waterloo, Ontario, Canada.
Brain Cogn. 2002 Mar-Apr;48(2-3):606-11.
For C, a digit-color synesthete, viewing a digit elicits a photism (an experience of a highly specific color), which is perceived as externally projected onto the digit. We used an object substitution paradigm to demonstrate the influence of C's photisms on her perception of digits. Object substitution refers to a form of masking that depends upon two critical factors: attention must be taxed (e.g., distributed among numerous distracters), and the mask must remain on-screen for a sufficient duration after the target has been removed. Results showed that for C, even under conditions that produced maximal object substitution in control participants, her endogenous coloring of target digits prevented object substitution. Thus, the present study clearly showed that C's photisms influence her ability to detect digits.
对于数字-颜色联觉者C来说，观看一个数字会引发一种光幻视（一种对高度特定颜色的体验），这种光幻视被感知为从外部投射到数字上。我们使用了一种客体替代范式来证明C的光幻视对她数字感知的影响。客体替代是指一种掩蔽形式，它取决于两个关键因素：注意力必须被消耗（例如，分散在众多干扰物之间），并且在目标移除后，掩蔽物必须在屏幕上保留足够长的时间。结果表明，对于C来说，即使在对照参与者中产生最大客体替代的条件下，她对目标数字的内源性着色也阻止了客体替代。因此，本研究清楚地表明，C的光幻视影响了她检测数字的能力。
