The Impact of Dynamic Assessment on EFL Learners’ Vocabulary Learning

This study was carried out to determine the effect of dynamic assessment (DA) on the EFL learners’ vocabulary learning. To do so, 50 EFL learners in Esfarayen, at the intermediate level of proficiency were selected as the sample of the study. Sandwich model of DA (pretest-mediation-posttest design) was used in this research. All participants of the study were assigned to two groups. One of the groups serving as an experimental group received mediation after pre-test. The second group as a control group did not receive any mediation. The analysis of data revealed that there were a significant difference between the experimental group performance and control group performance. Better to say, incorporation of DA as a supplementary procedure to standard testing has positive impact on Iranian EFL learners both test performance and vocabulary learning.