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Self-assessment and peer-assessment are two means of realizing the goals of educational assessment and learner-centered education. Although there are many arguments in favor of their educational benefits, they have not become common practices in educational settings. This is mainly due to the fact that teachers do not trust the pedagogical values and the reliability of learners’ self- and peer-assessment. With regard to these points, this study aimed at investigating the effect of doing self- and peer-assessments over time on the paragraph writing performance and the self- and peer-rating accuracy of a sample of Iranian English-major students. To do so, eleven paragraphs during eleven sessions were written and then self- or peer-rated by the students in two experimental groups. The findings indicated that self-and peer-assessment are indeed effective in improving not only the writing performance of the students but also their rating accuracy. After comparing the effects of self- and peer-assessment on the writing performance and the rating accuracy of the participants, peer-assessment, however, turned out to be more effective in improving the writing performance of the students than self-assessment. In addition, neither of the assessment methods outdid the other in improving the rating accuracy of the students.

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This study compares three integrated tasks of the TOEFL iBT speaking subtest in terms of complexity, accuracy, and fluency. To this end, a group of TOEFL iBT Iranian candidates took a simulated TOEFL iBT some days prior to their real exam. The collected oral responses were first transcribed and then quantified using software such as ‘Syllable Counter’ and ‘Coh-Metrix3’ for fluency and complexity, respectively. For accuracy, however, the responses were tallied manually. The results revealed the responses to the three speaking tasks were significantly different in terms of fluency. The difference in the accuracy index also turned significant, though the pairwise comparisons showed some inconsistencies. As for the selected complexity measures, lexical diversity, the mean number of modifiers per NP, and latent semantic analysis all showed significant differences between tasks 2 and 3 on the one hand and task 4 on the other. Left-embeddedness, however, revealed no significant difference among the three tasks. The results may support the influential role of prompting texts in such integrated speaking tasks