The Comparative Effect of Portfolio and Summative Assessments on EFL Learners' Writing Ability, Anxiety, and Autonomy
The present study was an attempt to systematically compare the effect of portfolio and summative assessment on writing ability, anxiety, and autonomy of English as a Foreign Language (EFL) learners. The participants were 70 male and female intermediate level EFL learners, between 19 and 35 (Mage = 27), who were non-randomly selected from among 90 EFL learners through employing a piloted sample of the Preliminary English Test (PET). They were randomly assigned into two experimental groups of 35, named portfolio assessment writing and summative assessment writing. Prior to the treatment phase, the participants filled out the English versions of Foreign Language Classroom Anxiety Scale (Horwitz, Horwitz, & Cope, 1986) and Zhang and Li's (2004) Learner Autonomy Questionnaire. The portfolio group was instructed based on the Classroom Portfolio Model, by Hamp-Lyons and Condon (2000), whereas in the summative assessment group, the common traditional summative assessment approach was implemented. After the treatment phase, both experimental groups were given another writing section of the PET test and the same anxiety and autonomy questionnaires as the posttests. The analysis of the test scores using two independent-samples t-tests and an analysis of covariance (ANCOVA) revealed that the summative assessment group had a significantly higher post-treatment level of anxiety. Furthermoe, the level of post-treatment autonomy in the portfolio assessment group was significantly higher. It was also concluded that there was a non-significant difference between the impact of portfolio and summative assessment on writing scores when controlling for the impact of pretest scores.