The present study aimed at finding whether L1 Turkish caused interference errors on Turkish EFL learners’ spoken English discourse. Whether English proficiency level had any effect on the number of errors learners made was further investigated. The participants were given the chance to choose one of the two alternative topics to speak about. The entire videotaped speaking session was further transcribed to analyze the spoken errors. The results indicated that prepositional, lexical, and grammatical errors were the most frequently encountered errors, in descending order. Also, independent samples t-test was applied to the data to determine whether English proficiency level had any effect on the number of errors made by two different English proficiency groups. It was found that there was no significant difference between two different English proficiency groups with regard to the number of errors they made.

中文翻译：

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土耳其英语学习者口语中土耳其语和英语的对比分析

本研究旨在发现L1土耳其语是否对土耳其EFL学习者的英语口语造成了干扰错误。英语水平是否对学习者犯错误的数量有进一步的影响。参与者有机会选择要谈论的两个替代主题之一。进一步录制了整个录像的会话，以分析口头错误。结果表明介词错误，词汇错误和语法错误是最常遇到的错误，按降序排列。此外，将独立样本t检验应用于数据，以确定英语水平是否对两个不同英语水平组犯下的错误数量有影响。