The Impact of Incidental and Intentional L2 Vocabulary Learning on Depths and Breadth Dimensions of Vocabulary Knowledge
Through the introduction of different dimensions of vocabulary knowledge, various studies attempted to examinenumerous effective factors on these dimensions. The present study aimed to show the effects of different vocabularylearning styles through extensive and intensive reading programs on depth and breadth aspects of vocabularyknowledge. To achieve this goal, 45 sophomore undergraduate students of English language teaching and translationin Payam-e-Noor University participated in this study. Initially, in order to homogenize the learners based on theirlevel of language proficiency, MEPT was administered. Then, by measuring the mean and standard deviation ofparticipants’ scores, the number of participants reduced to 35. The ultimate subjects’ scores on the readingcomprehension items of MEPT show that they are all at the intermediate level of reading ability. Participantsdivided into three experimental groups randomly: two groups were in the extensive reading program with differentform-focused and meaning-focused tasks as incidental vocabulary learning style. And the third group was in theintensive reading program as intentional vocabulary learning style. Participants in these experimental groups readlong stories or passages per week with ten goal-oriented words. After 8 weeks, Word Associates Test (WAT) andVocabulary Knowledge Scale (VKS) were administered to measure the acquired knowledge of new words and also,determining the effects of various learning styles on different dimensions of vocabulary knowledge. The results ofPaired-samples and Independent T-tests revealed that both incidental and intentional groups developed in the periodbetween the pre- and post-test, but, there was a significant difference between the effects of incidental vocabularylearning in the form of ER program and intentional vocabulary learning in the form of IR program. Moreover, therewas a significant difference between the effects of the form-focused and meaning-focused task.