Exploring the Use of Hedges and Boosters in the Independent Study (IS) Manuscripts of Thai EFL University Students

Main Article Content

Reuben H. Esteban

Abstract

This study investigates the use of hedges and boosters in 20 Independent Study (IS) manuscripts written by English for International Communication (EIC) undergraduate students of a university. The analysis identifies and categorizes these linguistic elements, exploring their role in shaping students’ academic writing style. A total of 288 hedges and 53 boosters were found, with hedges appearing significantly more frequently, accounting for 2.24% per 1,000 words, compared to boosters at 0.41%. The most commonly used hedges included modal auxiliaries and verbs such as may, might, would, and seem, reflecting the students’ tendency to express uncertainty, caution, and approximation. In contrast, verb and adverb boosters like show, always, and clearly were used more sparingly, indicating a lower level of confidence in their assertions. The distribution of these elements varied across different sections of the manuscripts, with the Introduction containing the highest frequency of both hedges and boosters, while the Methodology section showed the least use. These findings suggest that students rely heavily on hedging strategies to create a more measured academic tone, indicating their awareness of the complexities of their topics. The study recommends targeted instruction and peer review to help Thai EFL students develop more rigorous and confident academic writing.

Article Details

How to Cite
Esteban, R. H. (2026). Exploring the Use of Hedges and Boosters in the Independent Study (IS) Manuscripts of Thai EFL University Students. rEFLections, 33(2), 581–603. https://doi.org/10.61508/refl.v33i2.289459
Section
Research articles

References

Akman, E., & Karahan, P. (2023). Hedges and boosters in academic texts: A comparative study on English language teaching and physiotherapy research articles. RumeliDE Dil ve Edebiyat Araştırmaları Dergisi, 32, 1335–1349. https://doi.org/10.29000/rumelide.1252902

Alward, A. S., Mooi, C. C., & Bidin, S. J. B. (2012). Hedges and boosters in the Yemeni EFL undergraduates’ persuasive essays: An empirical study. The Internet Journal of Language, Culture and Society, 34, 1–12. http://www.educ.utas.edu.au/users/tle/JOURNAL/

Anthony, L. (2024). AntConc(Version 4.3.1) [Computer software]. Waseda University.https://www.laurenceanthony.net/software

Ardhianti, M., Susilo, J., Nurjamin, A., & Prawoto, E. (2023). Hedges and boosters in student scientific articles within the framework of a pragmatic metadiscourse. Journal of Languages and Language Teaching, 11(4), 626–634. https://doi.org/10.33394/jollt.v11i4.9018

Bailey, S. (2017). Academic writing: A handbook for international students (5th ed.). Routledge. https://doi.org/10.4324/9781315169996

Balle, S. H., & Olsen, M. (2024). From words to text – Academic writing in EFL classrooms. Nordic Journal of Language Teaching and Learning, 11(3), XVI–XXVII. https://doi.org/10.46364/njltl.v11i2.1149

Biber, D., Johansson, S., Leech, G., Conrad, S., & Finegan, E. (1999). Longman grammar of spoken and written English. Longman.

Bicknell, A. (2009). The independent study: A review of content and purpose (Worcester Business School Learning & Teaching Project). University of Worcester. https://eprints.worc.ac.uk/821/1/FinalAnnBicknellISProjectReport%282%29.pdf

Brown, J. D. (1988). Understanding research in second language learning (2nd ed.). Cambridge University Press.

Campbell, M. (2019). Teaching academic writing in higher education. Education Quarterly Review, 2, 608–614. https://doi.org/10.31014/aior.1993.02.03.92

Chaisiri, P., Kumdee, S., & Pramoolsook, I. (2025). An analysis of moves, hedges, and boosters in applied linguistics research article abstracts of Thai international journals. Social Sciences & Humanities Open, 11, Article 101397. https://doi.org/10.1016/j.ssaho.2025.101397

Chuanpipatpong, A. (2025). Thai EFL university students’ writing in the digital age: Error analysis revisited. PASAA, 70, 308–339. https://doi.org/10.58837/CHULA.PASAA.70.10

Coates, J. (1995). The expression of root and epistemic possibility in English. In J. Bybee & S. Fleischman (Eds.), Modality in grammar and discourse (pp. 55–56). John Benjamins Publishing Company.

Coffin, C. J., Curry, M. J., Goodman, S., & Hewings, A. (2003). Teaching academic writing: A toolkit for higher education. Routledge.

Crompton, P. (1997). Hedging in academic writing: Some theoretical problems. English for Specific Purposes, 16(4), 271–287. https://doi.org/10.1016/S0889-4906(97)00007-0

Daoud, S. A. (1998). How to motivate EFL learning and teaching of academic writing by cross-cultural exchanges. English for Specific Purposes, 17(4), 391–412. https://doi.org/10.1016/S0889-4906(97)00024-0

Demir, C. (2018). Hedging and academic writing: An analysis of lexical hedges. Journal of Language and Linguistic Studies, 14(4), 74–92.

Depraetere, I., & Reed, S. (2006). Mood and modality in English. In B. Aarts & A. McMahon (Eds.), The handbook of English linguistics (pp. 269–290). Blackwell Publishing.

Donadio, P., & Passariello, M. (2022). Hedges and boosters in English and Italian medical research articles: A cross-cultural comparison. International Journal of Language Studies, 16(1), 1–20.

Doushaq, H. H. (1986). An investigation into stylistic errors of Arab students learning English for academic purposes. English for Specific Purposes, 5(1), 27–39. https://doi.org/10.1016/0889-4906(86)90005-0

Erns, T. (2009). Speaker-oriented adverbs. Natural Language & Linguistic Theory, 27(3), 497–544. https://doi.org/10.1007/s11049-009-9069-1

Farrokhi, F., & Emami, S. (2008). Hedges and boosters in academic writing: Native vs. non-native research articles in applied linguistics and engineering. The Journal of Applied Linguistics, 1(2), 1–20.

Flowerdew, J. (1999). Writing for scholarly publication in English: The case of Hong Kong. Journal of Second Language Writing, 8(2), 123–145. https://doi.org/10.1016/S1060-3743(99)80109-0

Guest, G., Namey, E. E., & Mitchell, M. L. (2013). Collecting qualitative data: A field manual for applied research. SAGE Publications.

Hardjanto, T. (2016). Hedging through the use of modal auxiliaries in English academic discourse. Jurnal Humaniora, 28(1), 37–50. https://doi.org/10.22146/jh.v28i1.11412

Hashim, S. A. (2023). English modals as hedges and boosters in academic and journalistic articles. Asian Journal of Research in Education and Social Sciences, 5(3), 373–388. http://myjms.mohe.gov.my/index.php/ajress

Hinkel, E. (2005). Hedging, inflating, and persuading in L2 academic writing. Applied Language Learning, 15 (1 & 2), 29–53.

Holmes, J. (1984). Modifications and the negotiation of meaning in academic writing. Routledge.

Holmes, J. (1988). Doubt and certainty in ESL textbooks. Applied Linguistics, 9(1), 20–44.

Hyland, K. (1996). Nurturing hedges in the ESP curriculum. System, 24(4), 477–490. https://doi.org/10.1016/S0346-251X(96)00045-5

Hyland, K. (1998a). Boosting, hedging and the negotiation of academic knowledge. Text: Interdisciplinary Journal for the Study of Discourse, 18(3), 349–382. https://doi.org/10.1515/text.1.1998.18.3.349

Hyland, K. (1998b). Hedging in scientific research articles. John Benjamins Publishing Company.

Hyland, K. (2005). Metadiscourse: Exploring interaction in writing. Continuum.

Hyland, K., & Jiang, F. (2016). Change of attitude? A diachronic study of stance. Written Communication, 33(3), 251–274. https://doi.org/10.1177/0741088316650399

Hyland, K., & Milton, J. (1997). Qualification and certainty in L1 and L2 students’ writing. Journal of Second Language Writing, 16(2), 183–205. https://doi.org/10.1016/S1060-3743(97)90033-3

Hryniuk, K. (2018). Expert-like use of hedges and boosters in research articles written by Polish and English native-speaker writers. Research in Language, 16(3), 263–280. https://doi.org/10.2478/rela-2018-0013

Incharoensak, C., & Gampper, C. (2019). Hedges and boosters in the US college application essays: A corpus-based comparative study between the US middle and the US top college application essays. Thoughts, 2019(1), Article 166262. https://so06.tci-thaijo.org/index.php/thoughts/article/view/166262

Khunasathitchai, K., Sittironnarit, S., Sinturat, T., & Kumdee, S. (2025). Move analysis and hedge use in the research paper abstracts of Thai EFL English-majored undergraduates. rEFLections, 32(2), 951–973. https://doi.org/10.61508/refl.v32i2.282512

Lagerqvist, O. (2023). We might always use hedges and boosters in text: The English-Swedish translation of hedges and boosters in an academic literature textbook [Master’s thesis, Linnaeus University]. Linnaeus University.

Lakoff, G. (1972). Hedges: A study in meaning criteria and the logic of fuzzy concepts. In P. M. Peranteau, J. N. Levi, & G. C. Phares (Eds.), Papers from the Eighth Regional Meeting of the Chicago Linguistic Society (pp. 183–228). Chicago Linguistic Society.

Landis, J. R., & Koch, G. G. (1977). The measurement of observer agreement for categorical data. Biometrics, 33(1), 159–174. https://doi.org/10.2307/2529310

Lee, I. (2017). Classroom writing assessment and feedback in L2 school contexts. Springer Singapore.

Lo, Y. Y., Othman, J., & Lim, J. W. (2021). Mapping the use of boosters in academic writing by Malaysian first-year doctoral students. Pertanika Journal of Social Sciences & Humanities, 29(3), 1917–1937. http://www.pertanika.upm.edu.my/

Luyun, C. (2024). Language support for academic writing: Exploring the use of hedges and boosters in student research and designing language interventions. Contemporary Research in Education and English Language Teaching, 6(1), 84–104. https://doi.org/10.55214/26410230.v6i1.3421

Lyons, J. (1977). Semantics (Vol. 2). Cambridge University Press.

Mahdavirad, F. (2021). Hedging and boosting in the introduction and discussion sections of English research articles: A cross-cultural study of papers written by native and non-native academics. Iranian Journal of English for Academic Purposes, 10(1), 108–112.

Mallaki, R., Ebrahimi, S., & Farvardin, M. T. (2023). The functional aspects of hedges and boosters in academic writing. Journal of Pragmatics, 200, 125–138.

Mana, T. (2024). Peer feedback in Thai EFL writing: Students’ perceptions, accuracy, and revisions. English Language Teaching, 17(8), 10–20. https://doi.org/10.5539/elt.v17n8p10

Markkanen, R., & Schröder, H. (Eds.). (1997). Hedging and discourse: Approaches to the analysis of a pragmatic phenomenon in academic texts. De Gruyter.

Mauranen, A. (1993). Contrastive ESP rhetoric: Metatext in Finnish-English economics texts. English for Specific Purposes, 12(1), 3–22. https://doi.org/10.1016/0889-4906(93)90009-J

Ningrum, S., Puspita, H., & Mulyadi, A. I. (2024). Hedges and boosters in academic writing of ASEAN EFL learners. Journal of English Education and Teaching, 8(1), 202–218. https://doi.org/10.33369/jeet.8.1.202-218

Nur, S., Anas, I., & Rahayu. (2022). Engaging novice writers in online collaborative review through peer review circles. International Journal of Language Education, 6(1), 63–74. https://doi.org/10.26858/ijole.v6i1.26141

Palmer, F. (2007). Mood and modality. Cambridge University Press.

Paltridge, B., & Starfield, S. (2016). Getting published in academic journals: Navigating the publication process. University of Michigan Press. https://doi.org/10.3998/mpub.5173299

Petchkij, W. (2019). Explicit teaching of hedges: Bringing hedging in academic writing into the Thai EFL classroom. TESOL Quarterly, 53(4), 1062–1077. https://doi.org/10.1002/tesq.527

Pongpuehee, S., Phengjan, P., Deesawat, P., & Phutthala, W. (2020). Problems in writing research and their causes in independent study course of the fourth-year English major students at Buriram Rajabhat University. Journal of English Language and Linguistics, 1(1), 85–96.

Prapobratanakul, C. (2024). Thai EFL undergraduate engineering students’ perspectives on academic writing: Challenges and strategies. PASAA, 68, 1–31. https://doi.org/10.58837/CHULA.PASAA.68.1.1

Ramírez, J. A. (2014). Genre-based principles in a content-based English as a second language pull-out classroom. In L. C. de Oliveira & J. Iddings (Eds.), Genre pedagogy across the curriculum: Theory and application in U.S. classrooms and contexts (pp. 55–74). Equinox Publishing.

Ranjbar, M., Yazdani, H., Ahmadian, M., & Amerian, M. (2023). On the use of hedges and boosters in different sections of research articles published in national and international journals. Jordan Journal of Modern Languages and Literatures, 15(3), 783–796.

Rodliyah, I. N., Juliati, J., & Lestari, I. P. (2017). Improving EFL students’ academic writing through scaffolding, self-correction, and peer review. Proceedings of The Tenth Conference on Applied Linguistics and The Second English Language Teaching and Technology Conference in collaboration with The First International Conference on Language, Literature, Culture, and Education, 1, 181–186. https://doi.org/

5220/0007164201810186

Rose, K. R. (2005). On the effects of instruction in second language pragmatics. System, 33(3), 385–399. https://doi.org/10.1016/j.system.2005.06.003

Rozumko, A. (2017). Adverbial markers of epistemic modality across disciplinary discourses: A contrastive study of research articles in six academic disciplines. Studia Anglica Posnaniensia, 52(1), 73–101. https://doi.org/10.1515/stap-2017-0004

Salager-Meyer, F. (1994). Hedges and textual communicative function in medical English written discourse. English for Specific Purposes, 13(2), 149–170. https://doi.org/10.1016/0889-4906(94)90013-2

Samad, I. S., Ismail, I., Dyah, M. M., & Fatmawati, F. (2025). CLIL in action: Enhancing academic writing and content knowledge in Indonesian university students. Maspul Journal of English Studies, 7(1), 30–42. https://doi.org/10.33487/majesty.v7i1.15

Sawetsiri, S., & Wudthayagorn, J. (2025). Implementing group dynamic assessment with Thai EFL undergraduate students: A closer look at their academic writing ability. rEFLections, 32(1), 521–549. https://doi.org/10.61508/refl.v32i1.280408

Schleppegrell, M. J. (2004). The language of schooling: A functional linguistics perspective. Lawrence Erlbaum Associates.

Seekhem, P., Jenpradab, S., Tarat, S., & Suniphan, T. (2024). The use of hedging devices in scientific research report writing: A corpus-based comparative study of graduate and undergraduate students in social sciences at a university in Thailand. Lawarath Social E-Journal, 6(2), 87–104. https://so04.tci-thaijo.org/index.php/lawarathjo/article/view/268678

Sepehri, M., Hajijalili, M., & Namaziandost, E. (2019). Hedges and boosters in medical and engineering research articles: A comparative corpus-based study. Global Journal of Foreign Language Teaching, 9(4), 215–225. https://doi.org/10.18844/gjflt.v9i4.4342

Serholt, S. (2012). Hedges and boosters in academic writing: A study of gender differences in essays written by Swedish advanced learners of English [Undergraduate thesis, University of Gothenburg]. GUPEA. https://gupea.ub.gu.se/items/d0092f94-af30-482a-b1d0-e737c3fc3c41

Shrivastava, S. (2016). Estimation of doubt and certainty in the academic writings of management students with a focus on gender differences. Journal of Studies in the English Language, 11, 126–165. https://so04.tci-thaijo.org/index.php/jsel/article/view/73320

Somsakoon, C., Wongsa, J., Promdam, N., & Suwannasom, T. (2023). A comparative study of hedging in English research article discussion written by Thai, Chinese, and Saudi Arabian writers. Journal of Community Development Research (Humanities and Social Sciences), 16(3), 23–34. https://www.journal.nu.ac.th/JCDR/article/view/Vol-16-No-3-2023-23-34/2204

Sukhanindr, M. (2009). Hedging in research articles about English language teaching written by Thai and native speakers of English. Journal of Studies in the Field of Humanities, 16(2), 109–120.

Takimoto, M. (2015). A corpus-based analysis of hedges and boosters in English academic articles. Indonesian Journal of Applied Linguistics, 5(1), 95–105. https://doi.org/10.17509/ijal.v5i1.836

Todorović, K. (2003). The IMRAD layout. Archive of Oncology, 11(3), 203–205. https://doi.org/10.2298/AOO0303203T

Tongsukkaeng, W., & Fangsaken, B. (2026). Grammatical error patterns in Thai EFL university writing: A surface strategy taxonomy analysis. World Journal of English Language, 16(4), 345–360. https://doi.org/10.5430/wjel.v16n4p345

Tribble, C. (2019). Expert, native or lingua franca? Paradigm choices in novice academic writer support. In P. Habibie & K. Hyland (Eds.), Novice writers and scholarly publication: Authors, mentors, gatekeepers (pp. 53–78). Springer. https://doi.org/10.1007/978-3-319-95333-5

Tun, S. L. L., Aung, K. T. T., & Moe, T. M. (2021). The use of linguistic signals in English research: Myanmar university context. Journal of English Language and Linguistics, 2(2), 47–58.

Varttala, T. (2001). Hedging in scientifically oriented discourse: Exploring variation according to discipline and intended audience [Unpublished doctoral dissertation]. University of Tampere.

Weigle, S. C., & Parker, K. (2012). Source text borrowing in an integrated writing assessment. Journal of Second Language Writing, 21(2), 118–133. https://doi.org/10.1016/j.jslw.2012.03.004

Wiboonwachara, L., & Rungrojsuwan, S. (2021). Hedging in English research articles of Thai academic writers. The New English Teacher, 14(2), 82–98.

Wishnoff, J. R. (2000). Hedging your bets: EFL learners’ acquisition of pragmatic devices in academic writing and computer-mediated discourse. Second Language Studies, 19(1), 119–148.

Yagız, O., & Demir, C. (2014). Hedging strategies in academic discourse: A comparative analysis of Turkish writers and native writers of English. Procedia – Social and Behavioral Sciences, 158, 260–268. https://doi.org/10.1016/j.sbspro.2014.12.085

Zhang, J. (2019). A semantic approach to the English modality. Journal of Language Teaching and Research, 10(4), 879–885. http://dx.doi.org/10.17507/jltr.1004.28

Zhang, L., & Wang, J. (2023). To be like a “scholar”: A study on the construction of authorial identity of Chinese EFL learners in academic writing: An intertextuality perspective. Frontiers in Psychology, 14, 1–13. https://doi.org/10.3389/fpsyg.2023.1297557