Reliability and validity of Web-based portfolio peer assessment: A case study for a senior high school’s students taking computer course |
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| Authors: | Chi-Cheng Chang Kuo-Hung Tseng Pao-Nan Chou Yi-Hui Chen |
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| Affiliation: | 1. Department of Technology Application and Human Resource Development, National Taiwan Normal University, No. 162, He-Ping E. Road, Section 1, Taipei 106, Taiwan;2. Graduate Institute of Business and Management, Meiho University, No.23, Pingguang Rd., Neipu, Pingtung, Taiwan;3. Department of Education, National University of Tainan, No.33, Sec. 2, Shu-Lin St., Tainan 700, Taiwan |
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| Abstract: | This study examined the reliability and validity of Web-based portfolio peer assessment. Participants were 72 second-grade students from a senior high school taking a computer course. The results indicated that: 1) there was a lack of consistency across various student raters on a portfolio, or inter-rater reliability; 2) two-thirds of the raters demonstrated inconsistency assessing different portfolios, i.e. inner-rater reliability; 3) peer-assessment scores were not consistent with teacher-assessment scores (criterion-related validity); 4) significant differences were found between peer-assessment scores and end-of-course examination scores, implying that Web-based portfolio peer assessment failed to reflect learning achievements (criterion-related validity). In short, Web-based portfolio peer assessment was not a reliable and valid method. |
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| Keywords: | Learning portfolios Web-based learning portfolios Web-based portfolio assessment Peer assessment |
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