159 Asian EFL Journal Research Articles. Vol. 27 Issue No. 1 February 2020 The Effect of Using the ‘Six Thinking Hats’ and Fishbone Strategies for Developing Saudi EFL Learners' Writing Competence Majid Mohammad Al-Khataybeh Professor of EFL Methodology, Mutah University, Jordan mizmal2000@yahoo.com Bio-profile: Majid Mohammad Al-Khataybeh is a Professor of EFL methodology. He worked as the Dean of the Faculty of Educational Sciences, Vice Dean of Students’ Affairs, Vice Dean of Educational Sciences, and Chairman of C. & I. He has also worked as Professor of Applied Linguistics at Imam Muhammad Ibn Saud Islamic University in K.S.A. for 3 years. He has attended various Intentional Conferences, published about 40 scholarly International articles, and published 4 books on learning English language skills. He supervised more than a hundred Ph.D. Dissertations and M.A. Theses. Abstract This study aimed at investigating the effect of using the six thinking hats and the fishbone strategies on the development of fourth year English language and Literature students' writing in the English language and Literature Department at Al- Immam Muhammad Ibn Saud Islamic University during the second semester in 2017/2018. The sample of the study consisted of 50 fourth year English language and Literature male students which was selected purposefully and assigned randomly into two groups; an experimental group of 28 students and a control group of 22 students. To achieve the purposes of the study, three topics were chosen from the Effective Academic Writing textbook. The instrument of the study was designed according to the characteristics of the six thinking hats and the fishbone strategies. Validity and reliability of the instrument were ensured. To guarantee the equivalence of the two groups, the researcher administrated a writing ability pre-test, and then the experimental group was taught using the six thinking hats and the fishbone strategies, whereas the control group was taught according to the conventional method. Descriptive statistics, One Way ANOVA and Scheffe for Multiple comparisons were used to analyze the results of the study. The findings of the study indicated that there were statistically significant differences at α≤0.05 in