中文書寫系統中詞與詞之間並無空格等視覺線索隔開，這使得中文讀者如何在一連串的字當中進行詞彙辨識和斷詞成為一個重要的議題。在本研究計畫中將探討每個字放在四個可能的詞內位置（單字詞、多字詞詞首/中/尾）的機率，可否做為中文讀者在閱讀句子時進行詞彙辨識和斷詞的統計線索。預定進行兩個實驗，將請大專學生閱讀理解句子並記錄眼動。每個句子中有一雙字目標詞C12，其後的詞C34 亦為雙字詞。在材料中操弄目標詞的詞尾C2 和後一詞的詞首C3 做為詞首/尾的機率高低。在計畫的實驗一中採用邊界典範（Rayner，1975）探討C2 的詞內位置機率可否在週邊預視時取得。在實驗二中則是探討因位於邊界的C2 和C3 的詞內位置機率高低造成斷詞的困難度，如何影響目標詞C12 的辨識。探討詞內位置機率可否成為斷詞線索、係在週邊預視或凝視當下時作用、以及邊界周圍的字的詞內位置機率如何影響目標詞的詞彙處理歷程，有助於了解中文閱讀中的詞彙辨識和斷詞機制，此乃中文閱讀中基礎且關鍵的歷程。由於中文書寫系統的獨特性，中文閱讀的研究，與西方語言的研究成果和模擬模型進行比較，可更了解跨語言的共通性和獨特性如何影響閱讀時的語言處理和眼動控制之間的關係。 Chinese sentences are written character by character without visual cues, such as inter-word spaces, for word boundaries. This raises the issue of how Chinese readers recognize words, most of which contain one or two characters, embedded in a series of characters. The goal of this proposal is to investigate whether Chinese readers are sensitive to statistical cues such as within-word character position probability (CPP) when recognizing and segmenting words during sentence reading. The probabilities of each character being used as a single-character word, the beginning, middle, or end character of multi-character words are calculated from the Academia Sinica balanced corpus. In two experiments, college students are instructed to read sentences for comprehension at their normal pace while their eye movements are recorded. A pair of two-character words (C12 and C34) is embedded in each sentence in which the CPPs of the ending character C2 and the beginning C3 are manipulated. In the first experiment, whether or not CPPs can be extracted from the parafovea is investigated by using the boundary paradigm (Rayner, 1975). In the second experiment, I will examine the effects of the CPPs of characters (C2 and C3) surrounding the word boundary between C12 and C34 on the foveal processing of C12. By investigating the issues of (1) statistical cues for word segmentation, (2) whether they have an effect during parafoveal or foveal processing, and (3) the effects of CPPs on word recognition, we will gain a deeper understanding of the mechanism underlying Chinese word recognition and segmentation, which is crucial in Chinese reading. Comparing results from Chinese reading and those from alphabetic writing systems will provide ample information about how language-specific and universal properties influence the relationship between language processing and eye movement control.