Drew Stefanie A, Awad Jasmine F, Hackney Brandon C, Fenn Elise
Department of Psychology, California State University, Northridge, CA, USA.
Perception. 2018 Aug;47(8):881-891. doi: 10.1177/0301006618779485. Epub 2018 May 28.
Grapheme-color synesthetes experience a sense of color when viewing graphemes (e.g., digits and letters). Traditionally, these synesthetic perceptions are considered to be unidirectional, where viewing a grapheme elicits a nonveridical sensation of color, but viewing a color does not induce a reciprocal sense of a grapheme. A growing body of research has emerged that suggests the potential for bidirectional percepts, wherein color facilitates additional grapheme perception. We present here a novel paradigm in which we presented two sets of pure color patches, based on synesthete's reported colors, side-by-side and asked participants to indicate the color patch with the greater affiliated magnitude. Results indicated that the odds of answering correctly on trials were significantly greater for synesthetes (80.2% accuracy) than nonsynesthetes (52.1% accuracy). These results are aligned with other reports that support the notion of inducing a sense of magnitude from color in synesthetes. These findings challenge the traditional model of synesthesia as a unidirectional phenomenon and have implications of the neuronal communications that underlie perception in general.
grapheme - 颜色联觉者在看到字形（如数字和字母）时会体验到一种颜色感觉。传统上，这些联觉感知被认为是单向的，即看到一个字形会引发一种非真实的颜色感觉，但看到一种颜色不会引发相应的字形感觉。越来越多的研究表明存在双向感知的可能性，即颜色有助于增强对字形的感知。我们在此提出一种新的范式，在该范式中，我们根据联觉者报告的颜色并排呈现两组纯色块，并要求参与者指出关联程度更高的色块。结果表明，联觉者在试验中正确回答的几率（准确率80.2%）显著高于非联觉者（准确率52.1%）。这些结果与其他支持从颜色中诱导联觉者产生大小感觉这一观点的报告一致。这些发现挑战了将联觉视为单向现象的传统模型，并对一般感知背后的神经元通信具有启示意义。
