眼跳发起位置对预视效应的影响

本文试图用实验的方法，通过调整目标词在句子中的位置，操纵目标词上注视点的眼跳发起位置，考察该变量对预视效应的影响。主要结果发现，和目标词上注视点的眼跳发起距离近的条件相比，眼跳发起距离远时凝视时间和回视路径时间的预视效应更大；但对数据的进一步分析表明这是一种阻碍效应。虽然“预视效益”这个词常用来代表预视加工，它实质包含了预视促进和阻碍两种不同的加工。本研究的结果有助于大家理解这两种不同性质的加工及其可能的影响因素。     

嵌套词汉字位置加工的亚词边界效应

使用眼动追踪技术，采用边界范式，考察了三字嵌套词的汉字位置加工是否存在亚词边界效应。实验以三字前嵌套词（如“历史系”）和三字后嵌套词（如“核技术”）为靶子，对次字和尾字进行操纵（相同、转置和替换）。结果发现：对于前嵌套词，靶子的注视时间在替换条件显著长于转置条件，相同条件和转置条件差异不显著；对于后嵌套词，靶子的注视时间在转置条件显著长于相同条件，替换条件和转置条件差异不显著。结果表明：跨亚词边界汉字转置不影响词汇识别，而亚词首字转置干扰词汇识别。     

Contrasting off-line segmentation decisions with on-line word segmentation during reading

In two experiments, we investigated the correspondences between off-line word segmentation and on-line segmentation processing during Chinese reading. In Experiment 1, participants were asked to read sentences which contained critical four-character strings, and then, they were required to segment the same sentences into words in a later off-line word segmentation task. For each item, participants were split into 1-word segmenters (who segmented four-character strings as a single word) and 2-word segmenters (who segmented four-character strings as 2 two-character words). Thus, we split participants into two groups (1-word segmenters and 2-word segmenters) according to their off-line segmentation bias. The data analysis showed no reliable group effect on all the measures. In order to avoid the heterogeneity of participants and stimuli in Experiment 1, two groups of participants (1-word segmenters and 2-word segmenters) and three types of critical four-character string (1-word strings, ambiguous strings, and 2-word strings) were identified in a norming study in Experiment 2. Participants were required to read sentences containing these critical strings. There was no reliable group effect in Experiment 2, as was the case in Experiment 1. However, in Experiment 2, participants spent less time and made fewer fixations on 1-word strings compared to ambiguous and 2-word strings. These results indicate that the off-line word segmentation preferences do not necessarily reflect on-line word segmentation processing during Chinese reading and that Chinese readers exhibit flexibility such that word, or multiple constituent, segmentation commitments are made on-line.     

Developmental emergence of holistic processing in word recognition

Holistic processing (HP) of faces refers to the obligatory, simultaneous processing of the parts and their relations, and it emerges over the course of development. HP is manifest in a decrement in the perception of inverted versus upright faces and a reduction in face processing ability when the relations between parts are perturbed. Here, adopting the HP framework for faces, we examined the developmental emergence of HP in another domain for which human adults have expertise, namely, visual word processing. Children, adolescents, and adults performed a lexical decision task and we used two established signatures of HP for faces: the advantage in perception of upright over inverted words and nonwords and the reduced sensitivity to increasing parts (word length). Relative to the other groups, children showed less of an advantage for upright versus inverted trials and lexical decision was more affected by increasing word length. Performance on these HP indices was strongly associated with age and with reading proficiency. Also, the emergence of HP for word perception was not simply a result of improved visual perception over the course of development as no group differences were observed on an object decision task. These results reveal the developmental emergence of HP for orthographic input, and reflect a further instance of experience-dependent tuning of visual perception. These results also add to existing findings on the commonalities of mechanisms of word and face recognition.

Research Highlights

• Children showed less of an advantage for upright versus inverted trials compared to adolescents and adults.
• Relative to the other groups, lexical decision in children was more affected by increasing word length.
• Performance on holistic processing (HP) indices was strongly associated with age and with reading proficiency.
• HP emergence for word perception was not due to improved visual perception over development as there were no group differences on an object decision task.