ANOVA Calculator—One Way ANOVA and Tukey HSD test. (2017a). Statistics Calculators. https://www.statskingdom.com/180Anova1way.htmlSearch in Google Scholar
Carroll, L. (1994). Alice in Wonderland and Through the Looking-glass and What Alice Found There. Book-of-the-Month Club.Search in Google Scholar
Crookes, G., & Gass, S. M. (1993). Tasks and Language Learning: Integrating Theory and Practice. Multilingual Matters. Multilingual Matters, Ltd.Search in Google Scholar
Ellis, N. (1994). A Theory of Instructed Second Language Acquisition.”. In Implicit and Explicit Learning of Languages. Academic Press.Search in Google Scholar
Ellis, R. (1988). The Role of Practice in Classroom Learning. AILA Review, 5, 20–39.Search in Google Scholar
Ellis, R. (1995). Interpretation Tasks for Grammar Teaching. TESOL Quarterly, 29(1), 87–105.Search in Google Scholar
Krashen, S. D. (1984). Principles and Practice in Second Language Acquisition (Reprinted). Pergamon Press.Search in Google Scholar
Krashen, S. D., & Terrell, T. D. (2011). The natural approach: Language acquisition in the classroom. Phoenix.Search in Google Scholar
Learn English with Rebecca · engVid (Director). (2017, November 2). No more mistakes with MODALS! 3 Easy Rules [YouTube English Lesson]. https://www.youtube.com/watch?v=5Dq7lEw7CKMSearch in Google Scholar
Rosmanitz, N. (2022). Modal verbs—PDF Grammar Worksheet—B1—MOD007. English Practice. https://www.english-practice.at/Search in Google Scholar
Swain, M. (1985). Communicative Competence Role of Input and Output. Scribd. https://www.scribd.com/doc/179356182/Swain-1985-communicative-competence-role-of-input-and-output-pdfSearch in Google Scholar
Swain, M. (2000). The output hypothesis and beyond: Mediating acquisition through collaborative dialogue. In J. P. Lantolf (Ed.), Sociocultural Theory and Second Language Learning (pp. 97–114). Oxford University Press.Search in Google Scholar
Two-sample t-test calculator (Welch’s t-test). (2017b). Statistics Calculators. https://www.statskingdom.com/150MeanT2uneq.htmlSearch in Google Scholar
van Engelenburg, G. (1999). Statistical Analysis for the Solomon Four-Group Design. Research Report 99-06. Faculty of Educational Science and Technology, University of Twente, TO/OMD, P. https://eric.ed.gov/?q=ED435692&id=ED435692Search in Google Scholar