This study examined the Iranian EFL learners’ multicultural developmental trend in light of Investment Hypothesis as they furthered their academic studies from BA toward postgraduate levels. In so doing 117 BA, 92 MA, and 35 Ph.D. EFL students at AllamehTabataba’i University, Tarbiat Modarres, and Islamic Azad Universities, Tehran, Iran, were randomly selected to provide answers to Multicultural Personality Traits Questionnaire (MPQ) that measures individuals’ Multicultural Personality Traits (MPTs: Cultural Empathy, Open-Mindedness, Social Initiative, Emotional Stability, and Flexibility). Ph.D. students’ MPTs mean was found to be 277.77 MA students’ MPTs mean score was 272.20 and BA students’ MPTs mean score was 267.96.  The ANOVA conducted revealed that EFL Iranian students’ MPTs improved as they furthered their academic career from BA to MA and from MA to Ph.D. levels. The study concluded that advancement in EFL students’ academic career resulted in a concomitant development in their MPTs and among the five MPTs, cultural empathy and social initiative were found to have been significantly improved at Ph.D. level. Among the MPTs, Social initiative provides the highest contribution to social interactions and its significant development at Ph.D. level is confirmatory of the discursive-constructionists’ approach to L2 learning.

The present study was an attempt to investigate the significance of verbalization and teaching the concepts of listening on the development of listening performance among Iranian EFL learners. To do so, an experimental study was designed in which the participants were sixty pre-intermediate learners selected based on the results of their performance on a standard version of Oxford Placement Test (OPT). The participants were divided into two experimental groups. The learners in experimental group I (Systemic Theoretical Instruction- Explanation and Materialization (STI-EM), were exposed to materialized tools which consisted of presenting the target concept in charts accompanied by the examples and related strategies to extract the concept, while Group II students (Systemic Theoretical Instruction- Explanation, Materialization, and Verbalization (STI-EMV), enjoyed materialized tools as well as collaborative verbalization. The learners in both groups went through pre-test, intervention, and post-test. The collected data were analyzed through employing analysis of covariance (ANCOVA). The results indicated that the group which practiced collaborative verbalization in L1 outperformed the one which was just mediated by teacher's oral explanation and materialized objects.