Kim Sangyub, Nam Kichun
Wisdom Science Center, Korea University, Seoul, Republic of Korea.
School of Psychology, Korea University, Seoul, Republic of Korea.
Front Psychol. 2023 Nov 30;14:1293529. doi: 10.3389/fpsyg.2023.1293529. eCollection 2023.
Extant research has largely favored the Split Fovea Theory (SFT) over the Bilateral Projection Theory (BPT) in the context of foveal word recognition. SFT posits that during foveal fixation, letters in the left and right visual fields are projected to their respective contralateral hemispheres, thereby facilitating a division of labor across the bilateral hemispheres. This division may serve as a regulatory mechanism to mitigate redundant processing in both hemispheres. The present investigation conducted two experiments utilizing Korean visual words to explore whether this hemispheric division in foveal word recognition is a strategy to circumvent potential interhemispheric inhibition arising from duplicated processing. Experiment 1 established the suitability of Korean visual words for studies involving both unilateral and bilateral presentations. Experiment 2 revealed that the split presentation of a word elicited greater accuracy compared to its identical presentation in the bilateral visual fields. These findings lend credence to the notion that interhemispheric inhibition may drive the hemispheres to engage in divided labor, thereby reducing processing redundancy in foveal word recognition.
在中央凹单词识别方面，现有研究在很大程度上支持中央凹分裂理论（SFT）而非双侧投射理论（BPT）。SFT假定，在中央凹注视期间，左、右视野中的字母被投射到各自对侧半球，从而促进双侧半球的分工。这种分工可能作为一种调节机制，以减轻两个半球的冗余处理。本研究进行了两项实验，利用韩语视觉单词来探究中央凹单词识别中的这种半球分工是否是一种规避因重复处理而产生的潜在半球间抑制的策略。实验1确定了韩语视觉单词适用于涉及单侧和双侧呈现的研究。实验2表明，与单词在双侧视野中的相同呈现相比，单词的分裂呈现引发了更高的准确性。这些发现支持了这样一种观点，即半球间抑制可能促使半球进行分工，从而减少中央凹单词识别中的处理冗余。
