auditory input enhancement

Vocabulary is one of the essential components of language and learning phrasal verbs as part of vocabulary is quite challenging for foreign language learners. The present study aimed at investigating the effects of visual and auditory input enhancement on learning non-congruent phrasal verbs. The participants of the study were 90 intermediate English language learners who were divided into two experimental and one control groups. The first experimental group received visual input enhancement and the second experimental group auditory input enhancement, and the control group no enhanced material. All three groups were tested on their knowledge of non-congruent phrasal verbs before and after the treatment, using a non-congruent phrasal verb test developed by the researcher. The results of the data analyses indicated that both visual and auditory input enhancement were effective in learning non-congruent phrasal verbs by Iranian EFL learners, and that both groups outperformed the control group in their achievement. 

This study examined the impact of auditory input enhancement on the speaking abilities of Iranian EFL learners. Given the importance of speaking in language acquisition and the challenge of limited exposure to spoken English, the study focused on auditory input enhancement—altering intonation and pitch—to improve speaking proficiency. Fifty intermediate-level female learners, aged 18-28, from an English Language institute were selected based on their Oxford Placement Test (OPT) scores. Participants were divided into an experimental group, which received auditory input enhancement, and a control group, which followed traditional methods. Speaking abilities were evaluated with pretests and posttests using the Preliminary English Test (PET). An independent samples t-test analyzed the scores to test the hypothesis. Results indicated a statistically significant improvement in the experimental group's speaking performance compared to the control group, with Cohen's d showing a large effect size. These findings support previous research on input enhancement, underscoring the role of auditory input in focusing learners' attention on linguistic features and enhancing speaking performance. The study suggests that auditory input enhancement could be a valuable tool for EFL teachers and curriculum designers to improve learners' speaking skills.