This study investigates the claim that task-induced involvement load has an effect on vocabulary learning and examines the effect of task types and word concreteness on intentional vocabulary learning in the Korean EFL context. This study aims at testing whether productive word-focused tasks lead to equally effective vocabulary learning when the total involvement load index is equal but the distribution of index levels of each component (need, search, and evaluation) is different. The three productive word-focused task types are gap-fillig, sentence writing, and gap-filling through word transformation. In addition, in order to investigate the effect of word concreteness on vocabulary learning, two groups of target words were selected based on the level of word concreteness. In sum, the results of this study generally supported involvement load hypothesis (Laufer & Hulstijin, 2001) and test types and proficiency levels proved to be important variables that affect vocabulary learning. Moreover, the findings also indicated that word concreteness was not a major factor in vocabulary learning. The pedagogical implications and further suggestions are discussed.

The present study investigated which facets of perceived self-efficacy (PSE) in L2 reading are significantly related to L2 reading proficiency (L2RP), which type of linguistic knowledge feeds into PSE, and how they are related to L2RP when considered together. Participants (n = 95) were college students from two universities in Seoul. Four subcomponents of PSE were identified for investigation: text-based PSE, general PSE, PSE in linguistic knowledge, and PSE in authentic reading. The result of stepwise multiple regression analysis showed that the general PSE whose items reflect dimensions of social comparative influences and perceived controllability over environments was the only significant predictor of L2RP (R2 = 17.7%). For the relationships between linguistic knowledge and PSE, vocabulary knowledge (VK) was shown to be the only significant predictor of PSE when considered together with grammar knowledge (GK) and L2RP (R2 = 22.9%), while VK and GK were significant predictors of L2RP (R2 = 69.4%). PSE was not found to make an independent contribution to L2RP when considered with linguistic knowledge.

The present study examines L2 reading proficiency effects on the relative contribution of vocabulary knowledge and grammar knowledge to L2 reading comprehension for Korean high school EFL learners. To this end, 200 high school students were asked to take a vocabulary knowledge test, a grammar test, and a reading comprehension test. The participants were divided into three sub-groups by L2 reading ability in order to examine L2 proficiency effects. Multiple regression analyses for the sub-groups indicated the relationships among the three variables as distinctive. The results showed that syntactic knowledge had a predictive power for reading performance in the high reading group, but vocabulary had the same quality in the intermediate reading group. For the low reading group, neither vocabulary nor grammar could significantly account for the L2 reading variance. Theoretical implications and directions for further studies are discussed.

The study investigated whether Korean EFL students' vocabulary used in reading-based writing differed according to writing topic and their reading and writing proficiency. College students enrolled in writing courses (n=95) were asked to write argumentative essays in response to two readings on judging people by appearance (JPA) and disclosing personal information of serious criminals (DPI). These students were divided into high and low proficiency writer groups and into high and low proficiency reader groups according to their writing and reading scores respectively. The students' vocabulary used in writing was then analyzed by VocabProfile, which provided four lexical frequency lists: the first 1000 frequent words (K1) including function words (FW) and content words (CW), the second 1000 frequent words (K2), academic word list (AWL), and off the list words (OLW). The results indicated that the topic JPA produced a higher proportion of K1 and content words, whereas DPI generated more K2 and off the list words. None of the vocabulary profiles, however, significantly differed according to the students’ reading proficiency. In contrast, proficient writers were found to use significantly more K1 and function words than their counterparts. With the topic effect further considered, for JPA, proficient writers used more K1 words and function words whereas less proficient writers used more K2 and off the list words. With regard to DPl, proficient writers were found to use more function words than low proficient writers. Findings are discussed in more detail, along with implications.