Cognitive Psychological study on synesthetic perception as information integration

字形-颜色联觉研究揭示了字形-颜色联觉的某些特征。首先，通感颜色的决定因素进行了调查，为日本字素。结果显示，序数是最强的平假名字符的联觉颜色的预测，其次是声音，和视觉形状。提出了一个新的模型，它考虑到了字形学习的发展过程。该模型提供了通感决定过程的全面解释，包括不同书写系统之间的差异。第二，比较了非通感者在字形-颜色联想方面的差异。他们倾向于将更频繁的字素与更独特的颜色联系起来，这与联觉一致。非联觉者中的高联觉组产生了更广泛的联想。这一发现表明，他们的联觉特征更多地依赖于一对一的联系，这导致他们随着时间的推移具有更高的一致性。

Grapheme-color synesthesia research has revealed certain regularities in grapheme-color associations. First, the determinants of synesthetic color were investigated for Japanese graphemes. Results revealed that ordinality was the strongest predictor of synesthetic colors for Hiragana characters, followed by sound, and visual shape. A new model is proposed which takes into account the developmental process of grapheme learning. The model provides comprehensive explanation of synesthetic determination processes, including the differences across writing systems.Second, regularities in grapheme-color association were compared across non-synesthetes. They tended to associate more frequent graphemes with more distinctive colors, consistent with synesthetes. The high-synesthetic group in non-synesthetes produced a wider variety of associations. This finding suggested that their synesthetic traits depend more on one-to-one regularities, which lead to their higher consistency over time.