A Meta-Analysis Review of the Effects of Project-Based Learning on Critical Thinking in Educational Systems

Document Type : Original Article

Author

Department of English and Interpreting Studies, Faculty of Applied Sciences, Istanbul Gelişim University, Istanbul, Turkiye,

Abstract
Objective: This study aimed to determine the overall effect size of project-based learning (PBL) on the development of critical thinking and to examine its effectiveness across different educational levels through a systematic meta-analytic approach.
Method: The present research employed a quantitative meta-analysis conducted in accordance with the PRISMA guidelines. A total of 17 experimental and quasi-experimental studies published between 2019 and 2025 were selected based on predefined inclusion and exclusion criteria. The pooled effect size was calculated using Hedges’s g under a random-effects model (REML). Study heterogeneity was assessed using the Q statistic and the I² index, and subgroup analyses were performed based on educational level Publication bias was examined using Egger’s and Begg’s tests as well as the trim-and-fill method.
Results: The results indicated that project-based learning had a positive and statistically significant effect on critical thinking (g = 0.92, 95% CI: 0.83 to 1.01), representing a moderate-to-large effect size. Overall heterogeneity was low and non-significant (I² = 0%), although substantial heterogeneity was observed in certain subgroups, particularly at the university level. Subgroup analyses revealed variations in effect sizes across educational levels; however, these differences were not statistically significant. Tests for publication bias provided no conclusive evidence of serious bias, and the trim-and-fill analysis did not alter the overall effect size.
Conclusions: The findings support project-based learning as an effective, evidence-based instructional approach for enhancing critical thinking within educational systems. Nevertheless, given the limited number of eligible studies and variations in conceptualization and contextual factors, the generalizability of the results should be interpreted with caution. Further high-quality experimental research across diverse educational and cultural contexts is recommended.

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احمدی حسینیان نژاد، ف.، و شریعت کیانی، م. (1402). تأثیر آموزش تفکر انتقادی بر انعطاف‏پذیری شناختی، سرزندگی تحصیلی و خودپنداره تحصیلی در دانش‏آموزان دختر، پژوهش در نظام‏های آموزشی، 17(62), 98-110. https://doi.org/10.22034/JIERA.2023.401000.2990
رضاویسی، آ و م، مهاجر و سلیمی، م. (18 اسفند 1403). اثربخشی یادگیری مبتنی بر پروژه و تفکر انتقادی در بسترهای آموزشی گوناگون، چهارمین کنفرانس بین المللی پژوهش‏های مدیریت، تعلیم و تربیت درآموزش و پرورش، تهران ایران. https://www.ircemet.ir
شیخ‏الاسلامی، ع،. صدری دمیرچی، ا،. و محمدی، ف.(1402). اثربخشی روش آموزش معکوس بر گرایش به تفکر انتقادی دانش آموزان. پژوهش در نظام‏های آموزشی، (17)61، 32-22 https://doi.org/10.22034/jiera.2023.401404.2988.
 
Ahmadi Hosseinian Nejad, F., & Shariat Kiani, M. (2023). The effectiveness of critical thinking training on cognitive flexibility, academic vitality, and academic self-concept in female students. Journal of Research in Educational Systems, 17(62), 98–110. https://doi.org/10.22034/JIERA.2023.401000.2990
Almulla, M. A. (2020). The effectiveness of the project-based learning (PBL) approach as a way to engage students in learning. SAGE Open, 10(3), 1–15. https://doi.org/10.1177/2158244020938702
Al-Mulla, A. (2020). Project-based learning and the development of critical thinking skills among high school students in the Gulf region. International Journal of Education and Practice, 8(4), 512–523. https://doi.org/10.18488/journal.61.2020.84.512.523
Arabloo, P., Hemmati, F., Rouhi, A., & Khodabandeh, F. (2021). The effect of technology-aided project-based English learning on critical thinking and problem solving as indices of 21st century learning. Journal of Modern Research in English Language Studies, 9(1), 125–150. https://doi.org/10.30479/jmrels.2020.14077.1730
Brookfield, S. D. (2012). Teaching for critical thinking: Tools and techniques to help students question their assumptions. John Wiley & Sons.
Brown, J., & White, M. (2014). Comparative analysis of project-based learning and traditional instruction in developing critical thinking skills. Educational Psychology Review, 26(2), 267–278.
Chen, C. H., & Yang, Y. C. (2019). Revisiting the effects of project-based learning on students’ academic achievement: A meta-analysis investigating moderators. Educational Research Review, 26, 71–81. https://doi.org/10.1016/j.edurev.2018.11.001
Eshun, I., & Koranteng, U. (2026). Effectiveness of project-based learning in developing critical thinking skills. Journal of Innovative Classroom Teaching and Education (JICTE), 1(1). https://doi.org/10.69739/jicte.v1i1.1619
Fini, E. H., Awadallah, F., Parast, M. M., & Abu-Lebdeh, T. (2018). The impact of project-based learning on improving student learning outcomes of sustainability concepts in transportation engineering courses. European Journal of Engineering Education, 43(3), 473–488. https://doi.org/10.1080/03043797.2017.1393045
Fisher, A. (2011). Critical thinking: An introduction. Cambridge University Press.
Grachev, A., & Jung, S. (2018). A comparative study of traditional and project-based learning methods in higher education. Journal of Education and Learning, 7(4), 15–27. https://doi.org/10.5539/jel.v7n4p15
Guo, P., Saab, N., Post, L. S., & Admiraal, W. (2020). A review of project-based learning in higher education: Student outcomes and measures. International Journal of Educational Research, 102, Article 101586. https://doi.org/10.1016/j.ijer.2020.101586
Kim, E., & Park, S. (2021). Teacher professional development and the effectiveness of project-based learning. Professional Development in Education, 47(3), 391–407.
Lee, J., & Chen, W. (2023). Cognitive flexibility and project-based learning outcomes. Learning and Instruction, 78, Article 101118.
Lee, Y., & Kim, H. (2018). Teacher facilitation in project-based learning: Implications for critical thinking. Journal of Educational Psychology, 110(7), 1012–1025.
Lin, K. Y., Wu, Y. T., Hsu, Y. T., & Williams, P. J. (2021). Effects of infusing the engineering design process into STEM project-based learning to develop preservice technology teachers’ engineering design thinking. International Journal of STEM Education, 8, Article 1. https://doi.org/10.1186/s40594-020-00256-5
Loyens, S. M. M., van Meerten, J. E., Schaap, L., & Wijnia, L. (2023). Situating higher-order, critical, and critical-analytic thinking in problem- and project-based learning environments: A systematic review. Educational Psychology Review, 35(2), Article 39. https://doi.org/10.1007/s10648-023-09736-x
Ma, L., & Yang, X. (2021). 21st-century skills and digital learning environments. Education and Information Technologies, 26, 5231–5248.
Mohamed Razali, A. B., Joanna Joseph Jeyaraj, Sulaiman, T., & Song, X. (2024). Impact of project based learning on critical thinking skills and language skills in EFL context: A review of literature. World Journal of English Language, 14(5), 402–412. https://doi.org/10.5430/wjel.v14n5p402
Mohr, L. B., Hedges, L. V., & Thomas, S. (2009). Preferred reporting items for systematic reviews and meta-analyses: PRISMA guidelines. Journal of Clinical Epidemiology, 62(10), 1006–1012. https://doi.org/10.1016/j.jclinepi.2009.06.005
NAEP. (2021). National Assessment of Educational Progress. https://www.nationsreportcard.gov/
Nofiarida, N. (2023). Implementation of the project-based learning (PjBL) model as an attempt to improve the third-grade students’ critical thinking skills at SDN 004 rantau kopar. Primary: Jurnal Pendidikan Guru Sekolah Dasar, 12(2), 534–541. https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/9674
Okeke, J. (2014). Project-based approaches in African classrooms: A case study. African Journal of Education, 9(1), 77–89.
Onuka, A. O. U. (2015). Critical thinking in Nigerian education: Status, challenges, and prospects. Higher Education Studies, 5(1), 72–80. https://doi.org/10.5539/hes.v5n1p72
O’Reilly, M., Parsons, J., & Walker, D. (2022). Exploring the impact of project-based learning on higher-order thinking skills: A mixed-method study. Journal of Applied Educational Research, 14(2), 89–104.
Paul, R., & Elder, L. (2006). Critical thinking: The nature of critical and creative thought. Journal of Developmental Education, 30(2), 2–7.
Ramadhani, W. S., Azizah, U., & Nasrudin, H. (2024). Project-based learning on critical thinking skills in science learning: Meta-analysis. International Journal of Information, Communication and Technology in Education, 7(2), 136–142. https://www.ceeol.com/search/article-detail?id=1248876
Rezkilaturahmi, R., Retnawati, H., & Setiawan, R. (2025). Empowering students’ essential skills and motivation through project-based learning: A meta-analysis. Indonesian Journal of Education, 14(1), 1–18. https://ejournal.upi.edu/index.php/ije/article/view/71069
Rezavisi, A., Mohajer, M., & Salimi, M. (2024). The effectiveness of project-based learning and critical thinking in diverse educational contexts. In Proceedings of the 4th International Conference on Management, Education and Teaching Research. Tehran, Iran. [In Persian]
Sari, R. T., Angreni, S., Mohtar, L. E. M., Lufri, L., Asrizal, A., & Hardeli, H. (2024). Meta-analysis study: The influence of project based learning models on creativity and science learning outcomes of elementary school students. Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education), 12(3), 726–738. https://doi.org/10.24815/jpsi.v12i3.38375
Schmidt, M., & Müller, J. (2017). Teaching critical thinking: A cross-national study on attitudes and practices of university faculty. Higher Education, 73(4), 573–591. https://doi.org/10.1007/s10734-016-0036-1
Sheikholeslami, A., Sadri Demirchi, A., & Mohammadi, F. (2023). The effectiveness of flipped classroom instruction on students’ disposition toward critical thinking. Journal of Research in Educational Systems, 17(61), 22–32. https://doi.org/10.22034/jiera.2023.401404.2988 [In Persian]
Smith, A., & Jones, B. (2012). Impact of project-based learning on critical thinking in high school students. Journal of Educational Psychology, 104(2), 469–478.
Smith, A., & Jones, B. (2018). Impact of project-based learning on critical thinking skills in high school students. Journal of Educational Research, 111(3), 369–378. https://doi.org/10.1080/00220671.2016.1201480
Tafakur, T., Retnawati, H., & Shukri, A. A. M. (2023). Effectiveness of project-based learning for enhancing students’ critical thinking skills: A meta-analysis. JINoP (Jurnal Inovasi Pembelajaran), 9(2), 191–209. https://doi.org/10.22219/jinop.v9i2.22142
Taufik, T., Nurtamam, M. E., Dewanto, D., & Santosa, T. A. (2025). The effectiveness of deep learning based PjBL on student’s scientific and critical thinking skills at Indonesia. Jurnal Penelitian Pendidikan IPA, 11(9), 1–12. https://doi.org/10.29303/jppipa.v11i9.12857
Wardat, M., et al. (2022). Integrating STEM and project-based learning: Effects on student performance. Journal of STEM Education, 23(2), 45–60.
Williamson, E. (2023). The effectiveness of project-based learning in developing critical thinking skills among high school students. European Journal of Education, 1(1), 1–11.
Youssef, M. (2021). Critical thinking interventions in Arab universities: A meta-analytic approach. Higher Education Research, 46(2), 123–142.
Zhang, L. (2022). Intrinsic motivation and project-based learning in higher education. Journal of Educational Psychology, 114(5), 823–837.
Zhang, W., Guan, Y., & Hu, Z. (2024). The efficacy of project-based learning in enhancing computational thinking among students: A meta-analysis of 31 experiments and quasi-experiments. Education and Information Technologies, 29(11), 14513–14545. https://doi.org/10.1007/s10639-023-12283-6
Zhang, X. (2023). Project-based learning and critical thinking in Asian high schools: A meta-analysis. Asia Pacific Education Review, 24(1), 15–29.