Ghorbani Helena, Özturan Gülcenur, Albonico Andrea, Barton Jason J S
Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, Canada.
Department of Medicine (Neurology), University of British Columbia, Vancouver, Canada.
Exp Brain Res. 2025 Jan 18;243(2):45. doi: 10.1007/s00221-024-06986-6.
Tachistoscopic studies have established a right field advantage for the perception of visually presented words, which has been interpreted as reflecting a left hemispheric specialization. However, it is not clear whether this is driven by the linguistic task of word processing, or also occurs when processing properties such as the style and regularity of text. We had 23 subjects perform a tachistoscopic study while they viewed five-letter words in either computer font or handwriting. The task in one block was to respond if the word in the peripheral field matched a word just seen in the central field. In a second block with the same stimuli, the task was to respond if the style (handwriting or font) matched. We found a main effect of task: there was a right-field advantage for reading the word, but no field advantage for reporting the style of text. There was no effect of stimulus type and no interaction between task and stimulus type. We conclude that the field advantage for processing text is driven by the task, being specific for the processing the identity of the word and not the perception of the style of the text. We did not find evidence to support prior assertions that the type of text and its regularity influenced the field advantage during the word-reading task.
速示研究已经证实，在视觉呈现单词的感知方面存在右视野优势，这被解释为反映了左半球的专门化。然而，尚不清楚这是由单词处理的语言任务驱动的，还是在处理文本的风格和规律性等属性时也会出现。我们让23名受试者进行了一项速示研究，他们观看的是电脑字体或手写体的五个字母的单词。在一个实验块中，任务是判断外周视野中的单词是否与刚刚在中央视野中看到的单词匹配。在使用相同刺激的第二个实验块中，任务是判断风格（手写体或字体）是否匹配。我们发现了任务的主效应：在阅读单词时有右视野优势，但在报告文本风格时没有视野优势。没有刺激类型的效应，任务和刺激类型之间也没有交互作用。我们得出结论，处理文本的视野优势是由任务驱动的，它特定于处理单词的身份，而不是文本风格的感知。我们没有找到证据支持先前的断言，即文本类型及其规律性会影响单词阅读任务中的视野优势。
