Abstract
The purpose of this research was to design and conduct a performance assessment on students ability on implementing experiments. Its effects were also discussed. Related ability indicators were transformed into assessment objectives. There were four essential elements in the assessment objectives: performance task, response format, scoring rubrics, and meta rubrics, to ensure the quality of assessment design. After the pilot test with 26 students and formal test with 25 students, a two-stage assessing procedure was applied to motivate students learning and understanding. Pearsons r, Cronbachs α, and Kappas κ all indicated the consistent rating results from two raters. This study concluded that the two-stage four-element performance assessment functioned as a mediator to depict students ability structure, enhance their designing ability and provide teachers with feedback on teaching.
Keywords: | response format; nature science and life; ability indicators; scoring rubrics; performance assessment |
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