Wisdom Science Center, Korea University, Seoul, Republic of Korea.
Department of Psychology, Sogang University, Seoul, Republic of Korea.
Laterality. 2022 Sep;27(5):485-512. doi: 10.1080/1357650X.2022.2103144. Epub 2022 Jul 20.
Greater word length effects have been reported when a word was presented in the left visual field (LVF) than when presented in the right visual field (RVF). The current study employed 2 experiments to examine the visual-perceptual loci of asymmetric word length effect while testing the physical and linguistic length effects and the effect of visual angle increase at the RVF. Experiment 1 showed significant effects on the number of strokes in both VHFs (visual half fields) with the added significance of the number of syllables in the LVF, suggesting both parafoveal fields were affected by the physical length factors in contrast with the linguistic length factors, inducing asymmetric word length effects in the symmetrically presented word recognition in parafoveal vision. Experiment 2 widened the visual angle of the RVF presentation to test the differential effects of the visual-perceptual difficulty across the VHFs. It showed successful interruption at the RVF word recognition and comparable word length effects between the LVF and RVF. Therefore, this study suggests that the asymmetric word length effects in the parafoveal word recognition are attributable to the greater visual-perceptual difficulty at the LVF than at the RVF.
当一个单词在左视野（LVF）呈现时，其长度效应大于在右视野（RVF）呈现时。本研究通过两个实验来检验不对称词长效应的视觉感知位置，同时测试物理长度效应和语言长度效应，以及 RVF 视角增加的影响。实验 1 显示了在两个半视野（VHFs）中笔画数的显著影响，LVF 中音节数的影响更加显著，这表明与语言长度因素相比，两个周边视野都受到了物理长度因素的影响，导致了在周边视野中呈现的对称词识别中的不对称词长效应。实验 2 扩大了 RVF 呈现的视角，以测试 VHF 之间视觉感知难度的差异影响。它在 RVF 单词识别中成功地进行了中断，并且在 LVF 和 RVF 之间表现出了可比的词长效应。因此，本研究表明，在周边视野的单词识别中，不对称的词长效应归因于 LVF 比 RVF 具有更大的视觉感知难度。
