192Recent research has shown that many variables affect speakers' performance in word-naming tasks. As Balota, Cortese, Sergent-Marshall, Spieler, and Yap (2004) pointed out, such variables could include factors at various levels-for example, the surface level (initial phoneme), the lexical level (e.g., word length, word frequency, and spelling-to-sound consistency), and the semantic level (e.g., imageability and concreteness). These levels are not mutually exclusive and in fact sometimes overlap with one another-for example, word frequency could influence word naming at both the lexical and the semantic level.Previous studies in alphabetic languages, especially those languages with transparent orthographic systems, have suggested that lexical-level variables play more important roles than semantic-level variables in word-naming tasks (e.g., Balota et al., 2004;Barca, Burani, & Arduino, 2002;Frost, 1998;Lukatela & Turvey, 1994;Van Orden, Pennington, & Stone, 1990). For example, in Italian, a language with transparent orthography-phonology correspondences, Barca et al. (2002) found that only lexical-level variables (e.g., frequency, word length, and neighborhood size) had significant effects on the naming of nouns, whereas semantic variables (e.g., imageability and concreteness) had negligible influences. In English, in which the orthography-phonology relationship is less transparent, Balota et al. (2004) found that surface-, lexical-, and semantic-level variables all have an impact on word-naming performances. Semantic effects, however, have been shown by a few studies to be significant only for low-frequency and exception words (e.g., Strain, Patterson, & Seidenberg, 1995.Previous studies have also examined variables on word/ character 1 naming in nonalphabetic languages such as Chinese and Japanese. These studies have shown that surface and lexical variables such as word/character frequency, phonetic regularity, number of strokes, and number of components are also important for Chinese word naming (Leck, Weekes, & Chen, 1995;Zhou, Shu, Bi, & Shi, 1999). Other variables, such as initial phoneme of a syllable, age of acquisition, homophone density, and phonological frequency, have only recently been examined and shown to be important (Chen, Wang, Wang, & Peng, 2004;Liu, Zhang, & Shu, 2006;Ziegler, Tan, Perry, & Montant, 2000). Finally, semantic-level variables such as imageability and concreteness have also recently been found to be important in the processing of Japanese Kanji (Chinese characters; Shibahara, Zorzi, Hill, Wydell, & Butterworth, 2003), as well as in word naming and lexical decision in Chinese (Chen & Peng, 1998; see also Q. Zhang & Zhang, 1997). A major finding from Shibahara et al. (2003) was that semantic effects (i.e., imageability effect) were stronger in Kanji processing than in word processing in English.However, few previous studies have attempted to relate their experimental patterns (usually based on a small set of characters/words) to large-scale normative data, since collection of such...