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Belgium: Comenius 2. There have been numerous studies which explored the relationship between second language writing selfefficacy beliefs and foreign language writing anxiety. Similarly, in this study, Yen analyzed the conditions in which item difficulty is easy, average and difficult, and worked with items test length, normal ability distribution and with the sample size of How to summarize single participant research: Ideas and applications. The quantitative synthesis of single-subject research methodology and validation.

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