University of Nottingham, UK.
Cogn Neuropsychol. 2003 Jan 1;20(1):49-71. doi: 10.1080/02643290244000185.
The advantage for words in the right visual hemifield (RVF) has been assigned parallel orthographic processing by the left hemisphere and sequential by the right. However, an examination of previous studies of serial position performance suggests that orthographic processing in each hemifield is modulated by retinal eccentricity. To investigate this issue, we presented words at eccentricities of 1, 2, 3, and 4 degrees. Serial position performance was measured using the Reicher-Wheeler task to suppress influences of guesswork and an eye-tracker controlled fixation location. Greater eccentricities produced lower overall levels of performance in each hemifield although RVF advantages for words obtained at each eccentricity (Experiments 1 and 2). However, performance in both hemifields revealed similar U-shaped serial position performance at all eccentricities. Moreover, this performance was not influenced by lexical constraint (high, low; Experiment 2) or status (word, nonword; Experiment 3), although only words (not nonwords) produced an RVF advantage. These findings suggest that although each RVF advantage was produced by left-hemisphere function, the same pattern of orthographic analysis was used by each hemisphere at each eccentricity.
右视野（RVF）单词的优势被认为是由左半球进行平行的正字法处理，而由右半球进行顺序处理。然而，对序列位置表现的先前研究的考察表明，每个半视野中的正字法处理受到视网膜偏心度的调节。为了研究这个问题，我们在 1、2、3 和 4 度的偏心位置呈现单词。使用 Reicher-Wheeler 任务来测量序列位置表现，以抑制猜测和眼动追踪器控制的注视位置的影响。尽管在每个偏心位置都获得了 RVF 对单词的优势（实验 1 和 2），但较大的偏心度会导致每个半视野的整体表现水平降低。然而，在所有偏心位置，两个半视野的表现都显示出相似的 U 形序列位置表现。此外，这种表现不受词汇约束（高、低；实验 2）或状态（单词、非单词；实验 3）的影响，尽管只有单词（而非非单词）产生了 RVF 优势。这些发现表明，尽管每个 RVF 优势都是由左半球功能产生的，但在每个偏心位置，两个半球都使用了相同的正字法分析模式。
