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This study investigates the reliability and validity of instructor assessment in a web-portfolio assessment environment. The research target group consists of seventy-two students who take “Introduction to Computer” course of the second grade in some vocational high school. During experimental period, the students use the Web-based portfolio assessment system for creating their portfolio, emulating peers’ portfolio, and doing self-assessment and peer-assessment. The teacher uses the system for inspecting and assessing students’ learning performances. The results reveal that the rubric of the Web-based instructor assessment has an adequate reliability. The web-based instructor assessment has a high reliability between assessors as well as a high internal reliability within one assessor. Therefore, it is an assessment method with high reliability. In regard to validity, the rubrics of the web-based portfolio assessment have an adequate validity. The consistence between portfolio instructor assessment score and test score is high, which means the web-based instructor assessment has a high validity. Finally, the study recommends to develop the rubric of self-constructed e-portfolio created by PowerPoint, Word and FrontPage software and to investigate its reliability and validity.
|Appears in Collections:||教師著作|
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