Developing a scoring rubric for L2 summary writing: a hybrid approach combining analytic and holistic assessment

摘要

Background In our research project, we have developed a scoring rubric for a second language (L2) summary writing for English as a foreign language (EFL) students in Japanese universities. This study aimed to examine the applicability of our five-dimensional rubric, which features both analytic and holistic assessments, to classrooms in the EFL context. The examination especially focused on a newly added, optional overall quality dimension and two paraphrasing dimensions: paraphrase (quantity) and paraphrase (quality). Methods Six teacher raters evaluated 16 summaries written by Japanese EFL university student writers using our new rubric. The scoring results were quantitatively compared with the scoring results of a commonly used rubric developed by the Educational Testing Service (ETS). For the qualitative examination, the teacher raters’ retrospective comments on our five-dimensional rubric were analyzed. Results The quantitative examination demonstrated positive results as follows: (a) adding the optional overall quality dimension improved the reliability of our rubric, (b) the overall quality dimension worked well even if it was used alone, (c) our rubric and the ETS holistic rubric overlapped moderately as L2 summary writing assessments, and (d) the two paraphrasing dimensions covered similar but different aspects of paraphrasing. However, the quantitative analysis using the generalizability theory (G theory) simulated that the reliability (generalizability coefficients) of the rubric was not high when the number of raters decreased. The qualitative examination of the raters’ perceptions of our rubric generally confirmed the quantitative results. Conclusion This study confirmed the applicability of our rubric to EFL classrooms. This new type of rating scale can be characterized as a “hybrid” approach that offers the user a choice of analytic and holistic measures depending on individual purposes, which can enhance teachers’ explicit instructions.