The present research examined the effect of speech rate on listening comprehension of Iranian EFL learners. Initially, a sample of 108 sophomore EFL learners majoring in English translation was selected based on systematic random sampling from Abadan Islamic Azad University. Then, based on an ECCE proficiency test, 62 participants were chosen and divided into two homogeneous groups of 31. One group had exposure to natural speech rate and the other to slow speech rate of listening materials. After thirteen academic sessions, the results o the paired t-test regarding the pre-tests and post-tests of the two group means showed that both differences (group one: –2.83 and group two: –1.22) were significant at 0.05 levels (P < 0.05). These findings suggest that each speech rate, whether natural or slow, could improve EFL learners listening comprehension; however, natural speech rate could demonstrate greater improvements than slow speech rate in EFL learners’ listening comprehension.
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机译：本研究研究了语速对伊朗EFL学习者听力理解的影响。最初，基于来自阿巴丹伊斯兰阿扎德大学的系统随机抽样，选择了108名英语翻译专业的二年级英语学习者。然后，根据ECCE能力测试，选择了62名参与者，并将其分为两组，每组31人。一组处于自然语速，另一组则降低了听力材料的语速。经过13次学术会议后，关于两组均值的前测和后测的配对t检验结果表明，两者的差异（第一组：–2.83和第二组：–1.22）在0.05水平（ P <0.05）。这些发现表明，无论自然的还是缓慢的，每个语速都能提高英语学习者的听力理解能力。但是，自然语速比起EFL学习者的听力理解，与慢语速相比，有更大的进步。
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