The importance of input has been a broadly documented concept in the field of second or foreign language acquisition. However, kinds of input and ways of its presentation are among the controversial issues in L2 classroom research. Therefore, this study was designed to compare the effects of three kinds of input-based instruction on intake and acquisition of the English causative structures by Iranian EFL learners. A total of 105 university students in four intact classes were randomly assigned to four different conditions: processing instruction (PI), textual input enhancement (TE), consciousness-raising (C-R), and control (CO). A pretest/posttest (immediate and delayed) design was used, where participants’ ability to interpret and produce the target structure was assessed through administering a multiple choice interpretation test and a sentence-level production test. Moreover, a grammaticality judgment test was run to assess the amount of intake. Results revealed that learners in the PI group significantly outperformed learners in the other groups on both immediate/delayed production posttests. The findings also indicated that, C-R group could not retain the significant effect of instruction on delayed production posttest and TE tasks were not effective in improving the learners’ production of the target structure. Moreover, the PI group outperformed the other groups on grammaticality judgment test too. Based on these findings, we can conclude that PI which encompasses the most outstanding features of both focus on form and meaning instruction might be a more effective approach in helping EFL learners to acquire the target grammatical forms.

This paper provides a fairly detailed corpus-based vocabulary profile of the Iranian EFL books used in public schools. To this end, the WordPerfect files of all the seven books were converted to text format to get rid of the formatting features and be compatible with the software used for analysis. The software tools used were the Compleat Lexical Tutor suite, version 6.2 (Cobb, 2011), AntConc (Anthony, 2012), and AntWord Profiler (Anthony, 2012). The output of the analysis included general counts of words in Iranian school books at different levels, the frequent function and content words, frequent n-grams, frequent metalinguistic words, the coverage of several well-known, corpus-based word lists in these books, the range of the words across the books, and the amount of vocabulary recycling. The paper discusses the vocabulary representativeness and recycling and the adequacy of exposure to English in these EFL books. Detailed word frequency tables as well as some practical implications of the quantitative results constitute important features of this article.

Incidental vocabulary learning is often seen as superior to direct instruction on many occasions. Meanwhile, upon the emergence of the World Wide Web, second language (SL) learners have been introduced to 'podcasts' (recorded audio and video online broadcasts) which could be authentic sources of vocabulary learning. The relatively recent phenomenon of video podcast (vodcast) might be considered as a reliable complementary source of input to the written text or the audio track which are predominantly used to represent the platforms of SL instruction. To examine this assertion, three groups of Iranian EFL learners (n=63) were independently exposed to different modes of input (the reading text, audio track, and vodcast) during a series of classroom sessions under highly controlled circumstances. Immediate and delayed passive recall tests of vocabulary were administered to investigate their incidental gains. A multivariate analysis of variance revealed that both dependent variables (immediate and delayed recall) were significantly affected by the input modes. The post-hoc tests indicated no significant difference between the written and the audio groups while the vodcast group significantly outperformed the other two. The rich contextual clues made available by this audiovisual source seem to account for its superiority.

This study investigated the role of interactive output tasks in developing EFL learners’ vocabulary knowledge. The participants were 103 elementary female Iranian EFL learners who were randomly divided into three groups: input-only, input-output-no-interaction, and input-output-interaction. After all participants took a placement test and a vocabulary pretest, the input-only group was exposed to input tasks, while the other two groups received both input and output tasks with or without interaction. Then, all the participants took a vocabulary posttest. The results of ANOVA and Kruskal-Wallis tests showed that the participants in both the input-output-no-interaction group and the input-output-interaction group outperformed the ones in the input-only group in the vocabulary posttest (in both the overall vocabulary test and in the productive vocabulary section). Moreover, the results of the t-test and the Mann-Whitney test revealed that the participants in the interaction and no-interaction groups performed similarly on both the overall vocabulary posttest and the productive vocabulary section. The findings of this study support the idea that output is a facilitative factor for the acquisition of L2 vocabulary and, specifically, productive vocabulary development. The results also suggest that both interactive and non-interactive output-plus-input tasks can lead to higher achievement in vocabulary knowledge compared to the input-only condition lacking output tasks.

This study compared the effects of two types of form-focused tasks on proceduralization and transfer of linguistics knowledge in case of English modals. All participants of the study attended pretests, posttests and delayed posttests. The procedural comprehension and production knowledge were measured through the groups’ performance on a timed dual task test that resembled the context of practice. The transfer of knowledge was measured by evaluating the performance of participants on a timed dual task test in a context dissimilar from or reverse to the practice context. Three intact classes of intermediate EFL learners were randomly assigned to experimental and control groups. The output group (n= 27) received explicit grammar instruction and a combination of three output practice, while the input group (n=25) received explicit instruction and a combination of three input practice. Identical texts were exposed to the control group (n=25) through listening and reading tasks. The texts were followed by some questions irrelevant to English modals. On the procedural knowledge posttests, the experimental groups outperformed the control group. The participants were able to transfer the knowledge to dissimilar contexts. The results may help language teachers design more effective activities for the learners considering the institutional constraints.