Investigation of cognitive and metacognitive strategies used by preservice science teachers exposed to explicit and peer tutoring reading strategies instruction
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https://doi.org/10.33200/ijcer.1082537Keywords:
Cognitive strategies, Metacognitive strategies, Strategy instruction, Conceptual changeAbstract
The study aimed to investigate cognitive and metacognitive strategies and products of cognitive and metacognitive processes that preservice science teachers engaged in while reading heat-temperature text after being exposed to no reading strategy instruction, explicit reading strategy instruction, and peer tutoring reading strategy instruction. This study differs from other strategy teaching studies in terms of determining the cognitive and metacognitive reading strategies used by individuals after being exposed to different types of reading strategy instruction, which which was specifically designed to improve conceptual understanding. This study employed holistic multiple-case study wherein preservice teachers were assigned to one of the three groups that received no reading strategy instruction (n = 9), explicit reading strategy instruction (n = 10), and peer tutoring (n = 10) based on their scores on Metacognitive Awareness of Reading Strategies Inventory and good communication among them. The content of strategy instruction included various domain-specific reading comprehension strategies used for activating cognitive and metacognitive processes that contribute to improving conceptual understanding and conceptual change. It was found that the diversity and frequency of using cognitive strategies and products of cognitive processes were the highest in the explicit strategy instruction group, and the metacognitive strategies and products of metacognitive processes were more diverse and frequent in reading strategy instruction groups compared to no strategy instruction group.
References
Ahmadi, M. R., Ismail, H. N., & Abdullah, M. K. K. (2013). The importance of metacognitive reading strategy awareness in reading comprehension. English Language Teaching, 6(10), 235-244. http://dx.doi.org/10.5539/elt.v6n10p235
Akgul, P. (2010). Üstkavramsal faaliyetlerle zenginleştirilmiş kavramsal değişim metinlerinin fen bilgisi öğretmen adaylarının “ısı ve sıcaklık” konusundaki kavramsal anlamalarına etkisi [The effect of conceptual change texts enriched with metaconceptual processes on preservice science teachers' conceptual understanding about heat and temperature] (Publication No. 277999) [Master’s thesis, Gazi University]. Turkey Digital Theses database.
Al-Hassan, S. (2003). Reciprocal peer tutoring effect on high frequency sight word learning, retention, and generalization of fırst- and second grade urban elementary school students (Publication No. 3148152) [Doctoral dissertation, The Ohio State University]. ProQuest Dissertations & Theses Global.
Alegre-Ansuátegui, F. J., Moliner, L., Lorenzo, G., & Maroto, A. (2018). Peer tutoring and academic achievement in mathematics: A meta-analysis. Eurasia Journal of Mathematics, Science and Technology Education 14(1), 337–354. https://doi.org/10.12973/ejmste/79805.
Arco-Tirado, J. L., Fernández-Martín, F. D., & Fernández-Balboa, J. M. (2011). The impact of a peer-tutoring program on quality standards in higher education. Higher Education, 62(6), 773-788. https://doi.org/10.1007/s10734-011-9419-x
Bahar, M. A. (2018). Üstbilişsel okuma stratejisi eğitimi üzerine eleştirel bir gözden geçirme [A critical review on metacognitive reading strategy training]. In G. Aytaş & A. Uslu-Üstten (Eds). Prof. Dr. Alemdar Yalçın armağanı (pp.822-886). Akçağ Publishing.
Baker, L., Dreher, M. J., Shiplet, A. K., Beall, L. C., Voelker, A. N., Garrett, A. J., ... & Finger-Elam, M. (2017). Children’s comprehension of informational text: Reading, engaging, and learning. International Electronic Journal of Elementary Education, 4(1), 197-227.
Blasiman, R. N., Dunlosky, J., & Rawson, K. A. (2017). The what, how much, and when of study strategies: Comparing intended versus actual study behaviour. Memory, 25(6), 784–792. http://dx.doi.org/10.1080/09658211.2016.122197
Calhoon, M. B. (2005). Effects of a peer-mediated phonological skill and reading comprehension program on reading skill acquisition for middle school students with reading disabilities. Journal of Learning Disabilities, 38(5), 424-433.
Carrell, P. L. (1998). Can reading strategies be successfully taught? Australian Review of Applied Linguistics, 21(1), 1–20. https://doi.org/10.1075/aral.21.1.01car
Choi, I., Land, S. M., & Turgeon, A. J. (2005). Scaffolding peer-questioning strategies to facilitate metacognition during online small group discussion. Instructional Science, 33(5-6), 483-511. https://doi.org/10.1007/s11251-005-1277-4
Choi, K., Lee, H., Shin, N., Kim, S. W., & Krajcik, J. (2011). Re-conceptualization of scientific literacy in South Korea for the 21st century. Journal of Research in Science Teaching, 48(6), 670–697. https://doi.org/10.1002/tea.20424
Cromley, J. G. (2005). Metacognition, cognitive strategy instruction, and reading in adult literacy. Review of Adult Learning and Literacy, 5, 187-220.
De Backer, L., Van Keer, H., & Valcke, M. (2012). Exploring the potential impact of reciprocal peer tutoring on higher education students’ metacognitive knowledge and regulation. Instructional Science, 40(3), 559-588. https://doi.org/10.1007/s11251-011-9190-5
de Boer, H., Donker, A. S., & van der Werf, M. P. (2014). Effects of the attributes of educational interventions on students’ academic performance: A meta-analysis. Review of Educational Research, 84(4), 509-545. https://doi.org/10.3102/0034654314540006
Djudin, T. (2017). Using metacognitive strategies to improve reading comprehension and solve a word problem. Journal of Education, Teaching and Learning, 2(1), 124-129.
Dole, J. A., Nokes, J. D., & Drits, D. (2009). Cognitive strategy instruction. In S. E. Israel & G. G. Duffy (Eds.), Handbook of research on reading comprehension (pp. 347-372). Routledge.
Dole, J. A. & Sinatra, G. M. (1998). Reconceptalizing change in the cognitive construction of knowledge. Educational Psychologist, 33(2-3), 109-128. https://doi.org/10.1080/00461520.1998.9653294
Duffy, G. G., Roehler, L. R., Meloth, M. S., Vavrus, L. G., Book, C., Putnam, J., & Wesselman, R. (1986). The relationship between explicit verbal explanations during reading skill instruction and student awareness and achievement: A study of teacher effects. Reading Research Quarterly, 21(3), 237–252.
Fang, Z. & Wei, Y. (2010). Improving middle school students’ science literacy through reading infusion. The Journal of Educational Research, 103(4), 262-273. https://doi.org/10.1080/00220670903383051
Fiorella, L. & Mayer, R. E. (2016). Eight ways to promote generative learning. Educational Psychology Review, 28(4), 717-741. https://doi.org/10.1007/s10648-015-9348-9
Flavell, J. H. (1979). Metacognition and cognitive monitoring: A new area of cognitive-developmental inquiry. American Psychologist, 34(10), 906-911. https://doi.org/10.1037/0003-066X.34.10.906.
Garner, R. (1987). Metacognition and reading comprehension. Ablex Publishing.
Glogger, I., Schwonke, R., Holzäpfel, L., Nückles, M., & Renkl, A. (2012). Learning strategies assessed by journal writing: prediction of learning outcomes by quantity, quality, and combinations of learning strategies. Journal of Educational Psychology, 104, 452–468. https://doi.org/10.1016/j.tsc.2018.02.001
Ghavamnia, M. (2019). Improving Iranian graduate students’ performance in reading scientific articles in English through explicit strategy instruction. Reading Psychology, 40(7), 612-637. https://doi.org/10.1080/02702711.2019.1658667
Graesser, A. C., Leon, J. A., & Otero, J. (2002). Introduction to the psychology of science text comprehension. In J. Otero, J. A. Leon, & A. C. Graesser (Eds.), The psychology of science text comprehension (pp. 1–18). Erlbaum.
Gunstone, R. F., & Mitchell, I. J. (1998). Metacognition and conceptual change. In J. J. Mintzes, J. H. Wandersee & J. D. Novak (Eds.), Teaching science for understanding: A human constructivist view (pp.133-163). Academic Press.
Halim, N., Arif, M. M., & Supramaniam, K. (2020). Enhancing reading comprehension through metacognitive reading strategies and peer tutoring among year 7 students at a home school centre. Asian Journal of University Education, 16(1), 22-31.
Hennessey, M. G. (1999, March). Probing the dimensions of metacognition: Implications for conceptual change teaching-learning (ED446921). ERIC. https://eric.ed.gov/?id=ED446921
Jennings, J. H., Caldwell, J., & Lerner, J. W. (2014). Reading problems assessment and teaching strategies (7th ed.). Pearson Education.
Johnson, B. E., & Zabrucky, K. M. (2011). Improving middle and high school students' comprehension of science texts. International Electronic Journal of Elementary Education, 4(1), 19-31.
Kintsch, W. (2013). Revisiting the construction–integration model of text comprehension and its implications for instruction. In D. E. Alvermann, N. J. Unrau, & R. B. Ruddell (Eds.), Theoretical models and processes of reading (6th ed., pp. 807–839). Newark, DE: International Reading Association.
Kumlu, G. (2012). Alternatif kavramlara sahip fen ve teknoloji öğretmen adaylarında fen metinlerini okurlarken aktif hale gelen bilişsel ve üstbilişsel stratejiler [Cognitive and metacognitive strategies activated while the science texts being read by science and technology pre-service teachers having alternative concepts] (Publication No. 317153) [Master’s thesis, Gazi University]. Turkey Digital Theses database.
Laskey, M. L. & Hetzel, C. J. (2010). Self-regulated learning, metacognition, and soft skills: The 21st century learner. Retrieved from https://eric.ed.gov/?id=ED511589
Leutwyler, B. (2009). Metacognitive learning strategies: Differential development patterns in high school. Metacognition and Learning, 4(2), 111–123. https://doi.org/10.1007/s11409-009-9037-5
Love, O. C., Anyamene, A. N., & Anyachebelu, F. E. (2021). Effect of literature circle and peer tutoring on the reading comprehension achievement of primary school pupils in Awka South local government area of Anambra State. Journal of Emerging Trends in Educational Research and Policy Studies, 12(1), 33-38.
Luque, M. L. (2003). The role of domain-specific knowledge in intentional conceptual change. In G. L. Sinatra & P. R. Pintrich (Eds.), Intentional conceptual change (pp. 133-170). Erlbaum
Mason, L., & Boscolo, P. (2000). Writing and conceptual change. What changes? Instructional Science, 28(3), 199-226.
McNamara, D. S., Graesser, A. C., & Louwerse, M. M. (2012). Sources of text difficulty: Across genres and grades. In J. P. Sabatini, E. Albro, & T. O’Reilly (Eds.), Measuring up: Advances in how we assess reading ability (pp. 89–116). R&L Education.
Meneghetti, C., Carretti, B., & De Beni, R. (2006). Components of reading comprehension and scholastic achievement. Learning and Individual Differences, 16, 291–301. https://doi.org/10.1016/j.lindif.2006.11.001
Merriam, S. B., & Tisdell, E. J. (2016). Qualitative research: A guide to design and implementation (4th ed.). John Wiley & Sons.
Michalsky, T. (2013). Integrating skills and wills instruction in self-regulated science text reading for secondary students. International Journal of Science Education, 35(11), 1846–1873. https://doi.org/10.1080/09500693.2013.805890
Mikkilä-Erdmann, M., & Iiskala, T. (2020). Developing learning and teaching practices for adults: Perspectives from conceptual change and metacognition research. In E. K. Kallio (Ed.), Development of adult thinking: Interdisciplinary perspectives on cognitive development and adult learning (pp. 123-140). Routledge.
Mokhtari, K. & Reichard, C. (2002). Assessing students’ metacognitive awareness of reading strategies. Journal of Educational Psychology, 94(2), 249-259. https://doi.org/10.1037//0022-0663.94.2.249
Morehead, K., Rhodes, M. G., & DeLozier, S. (2016). Instructor and student knowledge of study strategies. Memory, 24(2), 257-271. http://dx.doi.org/10.1080/09658211.2014.1001992
Muteti, C. Z., Zarraga, C., Jacob, B. I., Mwarumba, T. M., Nkhata, D. B., Mwavita, M., ... & Mutambuki, J. M. (2021). I realized what I was doing was not working: The influence of explicit teaching of metacognition on students’ study strategies in a general chemistry I course. Chemistry Education Research and Practice, 22(1), 122-135. https://doi.org/10.1039/d0rp00217h
National Assessment Governing Board. (2012). Reading framework for the 2013 National Assessment of Education Progress. American Institutes for Research. https://www.nagb.gov/naep-frameworks/reading/2013-reading-framework.html
Ness, M. (2011). Explicit reading comprehension instruction in elementary classrooms: Teacher use of reading comprehension strategies. Journal of Research in Childhood Education, 25(1), 98-117. https://doi.org/10.1080/02568543.2010.531076
Ness, M. K. (2016). Reading comprehension strategies in secondary content area classrooms: Teacher use of and attitudes towards reading comprehension instruction. Reading Horizons: A Journal of Literacy and Language Arts, 49(2), 59-85.
Nielsen, W. S., Nashon, S., & Anderson, D. (2009). Metacognitive engagement during field-trip experiences: A case study of students in an amusement park physics program. Journal of Research in Science Teaching, 46(3), 265–288. https://doi.org/10.1002/tea.20266
Nietfeld, J. L., & Schraw, G. (2002). The effect of knowledge and strategy training on monitoring accuracy. The Journal of Educational Research, 95(3), 131-142. https://doi.org/10.1080/00220670209596583
Nist, S. L., & Holschuh, J. P. (2000). Comprehension strategies at the college level. In R. F. Flippo & D. C. Caverly (Eds.), Handbook of college reading and study strategy research (pp. 75-104). Erlbaum
Norris, S. P., & Phillips, L. M. (2003). How literacy in its fundamental sense is central to scientific literacy. Science Education, 87(2), 224-240. https://doi.org/10.1002/sce.10066
O’Malley, J. M., & Chamot, A. U. (1990). Learning strategies in second language acquisition. Cambridge University. https://doi.org/10.1017/CBO9781139524490
Ortlieb, E., Norris, M., & Christi, C. (2012). Using the think-aloud strategy to bolster reading comprehension of science concepts. Current Issues in Education, 15(1), 1-9.
Quinn, R. J., & Wilson, M. M. (1997). Writing in the mathematics classroom: Teacher beliefs and practices. The Clearing House, 71(1), 14–20. https://doi.org/10.1080/00098659709599316
Ozturk, E. (2012). Okuma Stratejileri Üstbilişsel Farkındalık Envanteri’nin Türkçe formunun geçerlik ve güvenirlik çalışması [The validity and reliability of the Turkish version of the Metacognitive Awareness of Reading Strategies Inventory]. İlköğretim Online, 11(1), 292-305.
Palincsar, A. S. (1986). The role of dialogue in providing scaffolded instruction. Educational Psychologist, 21(1&2), 73–98. http://dx.doi.org/10.1080/00461520.1986.9653025
Palincsar, A. S., Brown, A. L., & Martin, S. M. (1987). Peer interaction in reading comprehension instruction. Educational Psychologist, 22(3-4), 231-253. http://dx.doi.org/10.1080/00461520.1987.9653051
Paris, S. G., & Hamilton, E. E. (2009). The development of children’s reading comprehension. In S. E. Israel & G. G. Duffy (Eds.), Handbook of research on reading comprehension (pp. 32-53). Routledge.
Pilten, G. (2016). The evaluation of effectiveness of reciprocal teaching strategies on comprehension of expository texts. Journal of Education and Training Studies, 4(10), 232-247. http://dx.doi.org/10.11114/jets.v4i10.1791
Posner, G. J., Strike, K. A., Hewson, P. W., & Gertzog, W. A. (1982). Accommodation of a scientific conception: Toward a theory of conceptual change. Science Education, 66(2), 211-227. https://doi.org/10.1002/sce.3730660207
Pourhosein Gilakjani, A., & Sabouri, N. B. (2016). How can students improve their reading comprehension skill? Journal of Studies in Education, 6(2), 229-240. http://dx.doi.org/10.5296/jse.v6i2.9201
Roscoe, R. D., & Chi, M. (2008). Tutor learning: The role of explaining and responding to questions. Instructional Science, 36(4), 321–350. https://doi.org/10.1007/s11251-007-9034-5
Rupley, W. H., Blair, T. R., & Nichols, W. D. (2009). Effective reading instruction for struggling readers: The role of direct/explicit teaching. Reading & Writing Quarterly, 25(2-3), 125-138. https://doi.org/10.1080/10573560802683523
Saçkes, M. (2010). The role of cognitive, metacognitive, and motivational variables in conceptual change: Preservice early childhood teachers’ conceptual understanding of the cause of lunar phases (Publication No. 3438175) [Doctoral dissertation, The Ohio State University]. ProQuest Dissertations & Theses Global.
Sandi-Urena, S., Cooper, M. M., & Stevens, R. H. (2011). Enhancement of metacognition use and awareness by means of a collaborative treatment. International Journal of Science Education, 33(3), 323–340. https://doi.org/10.1080/09500690903452922.
Sinatra, G. M., & Pintrich, P. R. (Eds.) (2003). Intentional conceptual change. Erlbaum.
Spörer, N., Brunstein, J. C., & Kieschke, U. L. F. (2009). Improving students' reading comprehension skills: Effects of strategy instruction and reciprocal teaching. Learning and Instruction, 19(3), 272-286. https://doi.org/10.1016/j.learninstruc.2008.05.003
Thurston, A., Cockerill, M., & Chiang, T. H. (2021). Assessing the differential effects of peer tutoring for tutors and tutees. Education Sciences, 11(3), 97-108. https://doi.org/10.3390/educsci11030097
Topping, K. J. (2005). Trends in peer learning. Educational Psychology, 25(6), 631–645. https://doi.org/10.1080/01443410500345172
Uzun, L. (2001). Bilimsel metne özgü önbiçimlenişler ve bilimsel metin yazma edimi [Prototypical of scientific text and scientific text writing]. Anatolia: Turizm Araştırmaları Dergisi, 12(2), 197-204.
Van Keer, H. (2004). Fostering reading comprehension in fifth grade by explicit instruction in reading strategies and peer tutoring. British Journal of Educational Psychology, 74(1), 37-70. https://doi.org/10.1348/000709904322848815
Van Keer, H., & Verhaeghe, J. P. (2005). Effects of explicit reading strategies instruction and peer tutoring on second and fifth graders' reading comprehension and self-efficacy perceptions. The Journal of Experimental Education, 73(4), 291-329. https://doi.org/10.3200/JEXE.73.4.291-329
Vandergrift, L. (1997). The comprehension strategies of second language (French) listeners: A descriptive study. Foreign Language Annals, 30(3), 387-409. https://doi.org/10.1111/j.1944-9720.1997.tb02362.x
Veenman, M. V. J., Van Hout-Wolters, B. H. A. M., & Afflerbach, P. (2006). Metacognition and learning: Conceptual and methodological considerations. Metacognition and Learning, 1(1), 3–14. https://doi.org/10.1007/s11409-006-6893-0.
Veenman, M. V. J. (2011). Learning to self-monitor and to self-regulate. In R. E. Mayer & P. A. Alexander (Eds.), Handbook of research on learning and instruction. (pp. 197–218). Routledge.
Vosniadou, S., & Skopeliti, I. (2017). Is it the Earth that turns or the Sun that goes behind the mountains? Students’ misconceptions about the day/night cycle after reading a science text. International Journal of Science Education, 39(15), 2027-2051. https://doi.org/10.1080/09500693.2017.1361557
Vygotsky, L. S. (1978). Mind in society: The development of higher psychological processes (M. Cole, V. John-Steiner, S. Scriber, & E. Souberman, Eds.). Harvard University Press.
Xu, J., Ong, J., Tran, T., Kollar, Y., Wu, A., Vujicic, M., & Hsiao, H. (2021, May 8). The impact of study and learning strategies on post-secondary student academic achievement: A mixed-methods systematic review. Psyarxiv. https://doi.org/10.31234/osf.io/7ng5y
Wang, J. R., Chen, S. F., Fang, I., & Chou, C. T. (2014). Comparison of Taiwanese and Canadian students’ metacognitive awareness of science reading, text, and strategies. International Journal of Science Education, 36(4), 693–713. https://doi.org/10.1080/09500693.2013.826841
Webb, N. M. (1989). Peer interaction and learning in small groups. International Journal of Educational Research, 13(1), 21-39. https://doi.org/10.1016/0883-0355(89)90014-1
Wellington, J., & Osborne, J. (2001). Language and literacy in science education. Open University Press.
Wexler, J., Mitchell, M. A., Clancy, E. E., & Silverman, R. D. (2017). An investigation of literacy practices in high school science classrooms. Reading & Writing Quarterly, 33(3), 258-277. http://dx.doi.org/10.1080/10573569.2016.1193832
Wiser, M., & Amin, T. (2001). “Is heat hot?” Inducing conceptual change by integrating everyday and scientific perspectives on thermal phenomenon. Learning and Instruction, 11(4-5), 331-355. https://doi.org/10.1016/S0959-4752(00)00036-0
Yıldırım, A., & Şimşek, H. (2008). Sosyal bilimlerde nitel araştırma yöntemleri [Qualitative research methods in the social sciences] (7th ed.). Seçkin Publishing.
Yıldız, E. (2008). 5E modelinin kullanıldığı kavramsal değişime dayalı öğretimde üstbilişin etkileri: 7. sınıf kuvvet ve hareket ünitesine yönelik bir uygulama [The effects of metacognition during the instruction based on conceptual change used with 5E Model: An application regarding the force and motion subject in the 7th grade] (Publication No. 231557) [Doctoral dissertation, Dokuz Eylül University]. Turkey Digital Theses database.
Yore, L. D. (2012). Science literacy for all—more than a slogan, logo, or rally flag! In K. C. D. Tan, M. Kim, & S. Hwang (Eds.), Issues and challenges in science education research: Moving forward (pp. 5–23). Springer. https://doi.org/10.1007/978-94-007-3980-2_2
Yore, L., Hand, B., Goldman, S. R., Hildebrand, G. M., Osborne, J. F., Treagust, D. F., & Wallace, C. S. (2004). New directions in language and science education research. Reading Research Quarterly, 39(3), 347–352. https://doi.org/10.1598/RRQ.39.3.8
Yoshida, M. (2008). Think-aloud protocols and type of reading task: The issue of reactivity in L2 reading research. In M. Bowles, R. Foote, S. Perpiñán, & R. Bhatt (Eds.), Selected proceedings of the 2007 second language research forum (pp. 199–209). Cascadilla Proceedings Project.
Yurttaş-Kumlu, G. D. (2016). Doğrudan ve akranla öğretimin fen bilgisi öğretmen adaylarının ısı–sıcaklık konusundaki kavramsal anlamalarına etkisinin okuma stratejileri bakımından incelenmesi [Investigation of the effect of direct reading strategy instruction and peer tutoring reading strategy instruction which are applied pre-service science teachers’ conceptual understanding about heat-temperature in terms of reading strategies] (Publication No. 450082) [Doctoral dissertation, Gazi University]. Turkey Digital Theses database.
Yürük, N. (2005). An analysis of the nature of students’ metaconceptual processes and the effectiveness of metaconceptual teaching practices on students’ conceptual understanding of force and motion (Publication No. 3182729) [Doctoral dissertation, The Ohio State University]. ProQuest Dissertations & Theses Global.
Yürük, N., Beeth, M. E., & Andersen, C. (2009). Analyzing the effect of metaconceptual teaching practices on students’ understanding of force and motion concepts. Research in Science Education, 39(4), 449-475. https://doi.org/10.1007/s11165-008-9089-6
Zepeda, C. D., Richey, J. E., Ronevich, P., & Nokes-Malach, T. J. (2015). Direct instruction of metacognition benefits adolescent science learning, transfer, and motivation: An in vivo study. Journal of Educational Psychology, 107(4), 954. http://dx.doi.org/10.1037/edu0000022
Zhang, W.-X., Hsu, Y.-S., Wang, C.-Y., & Ho, Y.-T. (2015). Exploring the impacts of cognitive and metacognitive prompting on students’ scientific inquiry practices within an e-learning environment. International Journal of Science Education, 37(3), 529–553. https://doi.org/10.1080/09500693.2014.996796
Zohar, A., & David, A. B. (2009). Paving a clear path in a thick forest: a conceptual analysis of a metacognitive component. Metacognition and Learning, 4(3), 177-195. https://doi.org/10.1007/s11409-009-9044-6
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