IJMECS Vol. 16, No. 1, 8 Feb. 2024
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Blended learning adoption, technology acceptance, higher education, meta-analysis, digital education technology acceptance model
Numerous facets of life are impacted by the efficient application of technologies. Education, like all other fields, is a major area where technology is used to teach and learn effectively. One of these technologies that instructors and educators have recently become interested in is blended learning. This article aims at identifying the main constructs that highly influence the adoption of blended learning in higher education through meta-analytic literature review and proposing new technology acceptance model that is suitable for digital education tools. About 32 quantitative studies published since 2007 in journals and conferences are selected for performing weight computation and meta-analysis of constructs with a total sample size of 8,168. Moreover, the study also conceptualises the new technology acceptance model for digital education tools, considering both students and instructors as end users. The descriptive statistics indicate that there has been an increase in the number of publications since the year 2020. The results show that perceived ease of use, attitude toward usage, and perceived usefulness on intention to use are good predictors concerning student respondents, while performance expectancy on behavioural intention is found to be a good predictor concerning instructors. The results of the meta-analysis highlight the significance of blended learning in government and educational institutions that prioritises student ease of use and instructor performance expectancy and facilitating conditions. The results prove the effectiveness of blended learning in enhancing student learning experiences while improving educational practises and outcomes. In addition to identifying key factors influencing blended learning adoption in higher education, the study also suggests a novel model for implementing digital education tools, considering both student and instructor perspectives, thereby addressing a critical need in educational technology research. It offers actionable recommendations for policymakers and educational institutions to enhance the quality of higher learning.
S. Porkodi, Bassam Khalil Hamdan Tabash, "A Comprehensive Meta-Analysis of Blended Learning Adoption and Technological Acceptance in Higher Education", International Journal of Modern Education and Computer Science(IJMECS), Vol.16, No.1, pp. 47-71, 2024. DOI:10.5815/ijmecs.2024.01.05
[1]Becker, S. A., Cummins, M., Davis, A., Freeman, A., Hall, C. G., & Ananthanarayanan, V., “NMC horizon report: 2017 higher education edition”, (pp. 1-60), The New Media Consortium, 2017.
[2]Dziuban, C., Graham, C. R., Moskal, P. D., Norberg, A., & Sicilia, N., “Blended learning: the new normal and emerging technologies”, International journal of educational technology in Higher education, vol. 15, pp. 1-16, 2018. DOI: 10.1186/s41239-017-0087-5
[3]Sánchez-Gómez, M.C., Martín-García, A.V. and Mena, J., “Teachers' Beliefs Towards Blended Learning in Higher Education: A Mixed-Methods Study”, In International Workshop on Learning Technology for Education in Cloud (pp. 177-188). Springer, Cham, 2019. DOI: 10.1007/978-3-030-20798-4_16
[4]Radia, B., “Approaching a reading course via moodle-based blended learning: EFL learners’ insights”, Modern Journal of Language Teaching Methods (MJLTM), vol. 9, no. 11, 2019. DOI: 10.26655/mjltm.2019.11.1
[5]Triyason, T., Tassanaviboon, A. and Kanthamanon, P., “Hybrid classroom: Designing for the new normal after COVID-19 pandemic,” In Proceedings of the 11th International Conference on Advances in Information Technology (pp. 1-8), July 2020. DOI: 10.1145/3406601.3406635
[6]Sankar, J.P., Kalaichelvi, R., Elumalai, K.V. and Alqahtani, M.S.M., “Effective blended learning in higher education during COVID-19. Information Technologies and Learning Tools, vol. 88, no. 2, pp. 214-228, 2022. DOI: 10.33407/itlt.v88i2.4438
[7]Kharma, Q., Nairoukh, K., Hussein, A., Abualhaj, M. and Shambour, Q., “Online Learning Acceptance Model during Covid-19: An Integrated Conceptual Model,” International Journal of Advanced Computer Science and Applications, vol. 12, no. 5, 2021.
[8]Martín‐García, A.V., Martínez‐Abad, F. and Reyes‐González, D., “TAM and stages of adoption of blended learning in higher education by application of data mining techniques,” British Journal of Educational Technology, vol. 50, no. 5, pp. 2484-2500, 2019. DOI: 10.1111/bjet.12831
[9]Dakduk, S., Santalla-Banderali, Z. and Van Der Woude, D., “Acceptance of blended learning in executive education,” Sage Open, vol. 8, no. 3, p.2158244018800647, 2018. DOI: 10.1177/2158244018800647
[10]Vogelsang, K., Hagerer, I., Liere-Netheler, K. and Hoppe, U., “Analysis of the use of digital media to design a blended learning environment by the example of a master course lecture,” In Proceedings of the 11th International Multi-Conference on Society, Cybernetics and Informatics, vol. 11, pp. 127-131, 2017.
[11]Müller, C. and Mildenberger, T., “Facilitating flexible learning by replacing classroom time with an online learning environment: A systematic review of blended learning in higher education,” Educational Research Review, vol. 34, p.100394, 2021. DOI: 10.1016/j.edurev.2021.100394
[12]Porkodi, S., “An Analysis of Factors Impacting Moodle (E-Learning) Training Transfer Among Teachers in Colleges,” Euro MENA Dialogues Conference, Muscat, Oman, 2016.
[13]Altinpulluk, H, Kesim, M., “A Systematic Review of the Tendencies in the Use of Learning Management Systems,” Turkish Online Journal of Distance Education, vol. 22, no. 3, pp. 1-14, 2021. DOI: 10.17718/tojde.961812
[14]Al-Nuaimi, M.N. and Al-Emran, M., “Learning management systems and technology acceptance models: A systematic review,” Education and Information Technologies, vol. 26, no. 5, pp. 5499-5533, 2021. DOI: 10.1007/s10639-021-10513-3
[15]Zolotov, M.N., Oliveira, T. and Casteleyn, S., “E-participation adoption models research in the last 17 years: A weight and meta-analytical review,” Computers in Human Behavior, vol. 81, pp.350-365, 2018. DOI: 10.1016/j.chb.2017.12.031
[16]Buche, M.W., Davis, L.R. and Vician, C., “Does technology acceptance affect e-learning in a non-technology-intensive course?”, Journal of Information Systems Education, vol. 23, no. 1, p.41, 2012.
[17]Robinson, T., “Using the technology acceptance model to examine technology acceptance of online learning technologies by non-traditional students,” I-Manager's Journal of Educational Technology, vol. 16, no. 1, p.21, 2019.
[18]Hsieh, L.Y., Lu, Y.J. and Lee, Y.H., “Using the technology acceptance model to explore the behavioral intentions toward blended learning,” In International Workshop on Learning Technology for Education in Cloud (pp. 195-203). Springer, Cham, September 2014. DOI: 10.1007/978-3-319-10671-7_20
[19]Tshabalala M, Ndeya-Ndereya, C., van der Merwe, T., “Implementing Blended Learning at a Developing University: Obstacles in the way,” The Electronic Journal of e-Learning, vol. 12, no. 1, pp. 101-110, 2014.
[20]Anthony, B., Kamaludin, A., Romli, A., Raffei, A.F.M., Phon, D.N.A., Abdullah, A. and Ming, G.L., “Blended learning adoption and implementation in higher education: A theoretical and systematic review,” Technology, Knowledge and Learning, pp.1-48, 2022. DOI: 10.1007/s10758-020-09477-z
[21]Ramalingam, S., Yunus, M.M. and Hashim, H., “Blended learning strategies for sustainable English as a second language education: a systematic review,” Sustainability, vol. 14, no. 13, p.8051, 2022. DOI: 10.3390/su14138051
[22]Jeyaraj, A., Rottman, J. W., & Lacity, M. C., “A review of the predictors, linkages, and biases in IT innovation adoption research,” Journal of Information Technology, vol. 21, no 1, pp. 1–23, 2006. DOI: 10.1057/palgrave.jit.2000056
[23]Davis, F., “Perceived usefulness, perceived ease of use, and user acceptance of information technology,” MIS Quarterly, vol. 13, no. 3, pp. 319–340, 1989. DOI: 10.2307/249008
[24]Virani, S.R., Saini, J.R. and Sharma, S., “Adoption of massive open online courses (MOOCs) for blended learning: The Indian educators’ perspective,” Interactive Learning Environments, pp.1-17, 2020. DOI: 10.1080/10494820.2020.1817760
[25]Venkatesh, V., Morris, M. G., Davis, G. B., & Davis, F. D., “User acceptance of information technology: Toward a unified view,” MIS Quarterly, vol. 27, no. 3, pp. 425–478, 2003. DOI: 10.2307/30036540
[26]Zhou, M., Dzingirai, C., Hove, K., Chitata, T. and Mugandani, R., “Adoption, use and enhancement of virtual learning during COVID-19”, Education and Information Technologies, pp.1-21, 2022. DOI: 10.1007/s10639-022-10985-x
[27]Lake, P., “Factors influencing attitudes toward blended e-learning using learning management systems: A case study in a university in Thailand”, Humanities, Arts and Social Sciences Studies (Former Name Silpakorn University Journal of Social Sciences, Humanities, And Arts), pp.247-295, 2020. DOI: 10.14456/hasss.2020.10.
[28]Deng, C., Peng, J., and Li, S., “Research on the state of blended learning among college students – A mixed-method approach,” Front. Psychol. Vol. 13, pp. 1054137, 2022. DOI: 10.3389/fpsyg.2022.1054137
[29]Wood, S.L., “Technology for teaching and learning: Moodle as a tool for higher education,” International journal of teaching and learning in higher education, vol. 22, no. 3, pp. 299-307, 2010.
[30]Almutawa, A.M., “Antecedences of Continued Blended Learning Adoption Intentions: A Framework for Acceptance of Blended Distance Learning,” Journal of Engineering Research, vol. 10, no. 2A, pp. 72-81, 2022. DOI: 10.36909/jer.14171
[31]Hina, S., Dominic, P.D.D. and Zaidi, K.S., “Use of interactive tools for teaching and learning practices in higher education institutions,” International Journal of Business Innovation and Research, vol. 22, no. 4, pp. 469-487, 2020. DOI: 10.1504/IJBIR.2020.109034
[32]Tulinayo, F.P., Ssentume, P. and Najjuma, R., “Digital technologies in resource constrained higher institutions of learning: a study on students’ acceptance and usability,” International Journal of Educational Technology in Higher Education, vol. 15, no. 1, pp. 1-19, 2018. DOI: 10.1186/s41239-018-0117-y
[33]Lin, W.S., “Perceived fit and satisfaction on web learning performance: IS continuance intention and task-technology fit perspectives,” International Journal of Human-Computer Studies, vol. 70, no. 7, pp. 498-507, 2012. DOI: 10.1016/j.ijhcs.2012.01.006
[34]Khechine, H., Lakhal, S., Pascot, D. and Bytha, A., “UTAUT model for blended learning: The role of gender and age in the intention to use webinars,” Interdisciplinary journal of E-Learning and Learning objects, vol. 10, no. 1, pp. 33-52, 2014.
[35]Esawe, A.T., Esawe, K.T. and Esawe, N.T., “Acceptance of the learning management system in the time of COVID-19 pandemic: An application and extension of the unified theory of acceptance and use of technology model,” E-Learning and Digital Media, p.20427530221107788, 2022. DOI: 10.1177/20427530221107788
[36]Olivier, J., “Blended learning in a first-year language class: Evaluating the acceptance of an interactive learning environment,” Literator (Potchefstroom. Online), vol. 37, no. 2, pp. 1-12, 2016. DOI: 10.4102/lit.v37i2.1288.
[37]López Meneses, E., Vázquez Cano, E. and Mac Fadden, I., “MOOC in higher education from the students’ perspective. A sustainable model?,” In Qualitative and Quantitative Models in Socio-Economic Systems and Social Work, (pp. 207-223). Springer, Cham, 2020. DOI: 10.1007/978-3-030-18593-0_17
[38]Chen, X., Xu, X., Wu, Y.J. and Pok, W.F., “Learners’ Continuous Use Intention of Blended Learning: TAM-SET Model,” Sustainability, vol. 14, no. 24, p.16428, 2022. DOI: 10.3390/su142416428
[39]Bamoallem, B. and Altarteer, S., “Remote emergency learning during COVID-19 and its impact on university students’ perception of blended learning in KSA,” Education and Information Technologies, vol. 27, no. 1, pp. 157-179, 2022. DOI: 10.1007/s10639-021-10660-7
[40]Aldekheel, A.Y., Khalil, O. and AlQenaei, Z.M., “Factors Impacting Teachers’ Continued IT Adoption in Pre-College Education,” Journal of Information Technology Education: Research, vol. 21, pp.465-500, 2022. DOI: 10.28945/5029
[41]Gunasinghe, A. and Nanayakkara, S., “Role of technology anxiety within UTAUT in understanding non-user adoption intentions to virtual learning environments: the state university lecturers’ perspective,” International Journal of Technology Enhanced Learning, vol. 13, no. 3, pp.284-308, 2021. DOI: 10.1504/IJTEL.2021.115978
[42]Kaur, D.J., Saraswat, N. and Alvi, I., “Exploring the Effects of Blended Learning using WhatsApp on Language Learners' Lexical Competence,” Rupkatha Journal on Interdisciplinary Studies in Humanities, vol. 13, no. 4, 2021. DOI: 10.21659/rupkatha.v13n4.60
[43]Ibrahim, R., Leng, N.S., Yusoff, R.C.M., Samy, G.N., Masrom, S. and Rizman, Z.I., “E-learning acceptance based on technology acceptance model (TAM),” Journal of Fundamental and Applied Sciences, vol. 9, no. 4S, pp.871-889, 2017. DOI: 10.4314/jfas.v9i4S.50
[44]Pardamean, B.E.N.S., Suparyanto, T.E.D.D.Y. and Kurniawan, R.I.F.K.Y., “Assessment of graph theory e-learning utilizing learning management system,” Journal of Theoretical and Applied Information Technology, vol. 55, no. 3, pp.353-358, 2013.
[45]Im, I., Hong, S. and Kang, M.S. “An international comparison of technology adoption: Testing the UTAUT model,” Information & management, vol. 48, no. 1, pp.1-8, 2011. DOI: 10.1016/j.im.2010.09.001
[46]Radovan, M. and Kristl, N., “Acceptance of Technology and Its Impact on Teachers' Activities in Virtual Classroom: Integrating UTAUT and CoI into a Combined Model”, Turkish Online Journal of Educational Technology-TOJET, vol. 16, no. 3, pp.11-22, 2017.
[47]Han, X., “Influences of Online Practice Community on Instructors’ Blended Teaching Behaviors: Analysis Based on an Extended UTAUT Model,” Mathematical Problems in Engineering, 2022. DOI: 10.1155/2022/7084272
[48]Nadlifatin, R., Miraja, B., Persada, S., Belgiawan, P., Redi, A.A.N. and Lin, S.C., “The measurement of university students’ intention to use blended learning system through technology acceptance model (TAM) and theory of planned behavior (TPB) at developed and developing regions: Lessons learned from Taiwan and Indonesia,” International Journal of Emerging Technologies in Learning (iJET), vol. 15, no. 9, pp.219-230, 2020.
[49]Bervell, B., and Umar, I. N., “A decade of LMS acceptance and adoption research in Sub-Sahara African higher education: A systematic review of models, methodologies, milestones and main challenges,” Eurasia Journal of Mathematics, Science and Technology Education, vol. 13, no. 11, pp. 7269-7286, 2017. DOI: 10.12973/ejmste/79444
[50]Ma'arop, A. H., and Embi, M. A., “Implementation of blended learning in higher learning institutions: A review of the literature,” International Education Studies, vol. 9, no. 3, pp. 41-52, 2016.
[51]Al-Nuaimi, M. N., and Al-Emran, M., “Learning management systems and technology acceptance models: A systematic review,” Education and Information Technologies, vol. 26, no. 5, pp. 5499-5533, 2021. DOI: 10.1007/s10639-021-10513-3
[52]Al-Maroof, R., Al-Qaysi, N., Salloum, S. A., & Al-Emran, M., “Blended learning acceptance: A systematic review of information systems models,”. Technology, Knowledge and Learning, pp. 1-36, 2021. DOI: 10.1007/s10758-021-09519-0
[53]Krismadinata, U. V., Jalinus, N., Rizal, F., Sukardi, P. S., Ramadhani, D., Lubis, A. L., Friadi, J., Arifin, A.S.R., and Novaliendry, D., “Blended learning as instructional model in vocational education: literature review,” Universal Journal of Educational Research, vol. 8, no. 11B, pp. 5801-5815, 2020. DOI: 10.13189/ujer.2020.082214
[54]Kalaivani, C., “Blended and flipped learning for sustainable development of education”, Teaching and learning with emerging technology: A Future Perspective, 281, 2022.
[55]Kuntz, J., and Manokore, V., ““I Did Not Sign Up for This”: Student Experiences of the Rapid Shift from In-person to Emergency Virtual Remote Learning During the COVID Pandemic,” Higher Learning Research Communications, vol.12, pp. 110-146, 2022. COI: 10.18870/hlrc.v12i0.1316
[56]Siemens, G., "Preparing for the digital university: A review of the history and current state of distance, blended, and online learning”, Athabasca University, pp. 71, 2015. DOI:10.13140/RG.2.1.3515.8483
[57]Hussain, H., and Harris, H. N., An Infusion of Psychological Empowerment in Blended Learning Model: A New Approach Online Learning During Covid-19. Journal of Science and Mathematics Education in Southeast Asia, vol. 45, pp. 207-221, 2023. https://myjms.mohe.gov.my/index.php/jsmesea/article/view/18906
[58]Cronje, J., "Towards a new definition of blended learning." Electronic journal of e-Learning, vol. 18, no. 2, pp. 114-121, 2020. https://doi.org/10.34190/EJEL.20.18.2.001
[59]Dillon, A., and Morris, M. G., “User acceptance of new information technology: theories and models”, Annual Review of Information Science and Technology, vol. 14, no. 4, pp. 3-32, 1996. http://hdl.handle.net/10150/105584.
[60]Venkatesh, V., Thong, J. Y., and Xu, X., “Consumer acceptance and use of information technology: extending the unified theory of acceptance and use of technology”, MIS quarterly, vol. 36, no. 21, pp. 157-178. 2012. https://doi.org/10.2307/41410412
[61]Bonk, C.J., and Graham, C.R., “The handbook of blended learning environments: Global perspectives, local designs,” Pfeiffer essential resources for training and HR professionals, John Wiley & Sons, San Francisco, 2006.
[62]Webb, E., Campbell, D. T., Schwartz, R. D., and Sechrest, L., “Nonreactive research in the social sciences,” Chicago: Rand McNally, 1981.
[63]Page, M.J., McKenzie, J.E., Bossuyt, P.M., Boutron, I., Hoffmann, T.C., Mulrow, C.D., Shamseer, L., Tetzlaff, J.M. and Moher, D., “Updating guidance for reporting systematic reviews: development of the PRISMA 2020 statement,” Journal of clinical epidemiology, vol. 134, pp.103-112, 2021. DOI: 10.1016/j.jclinepi.2021.02.003.
[64]Lazar, I.M., Panisoara, G. and Panisoara, I.O., “Digital technology adoption scale in the blended learning context in higher education: Development, validation and testing of a specific tool,” PloS one, vol. 15, no. 7, p.e0235957, 2020. DOI: 10.1371/journal.pone.0235957.
[65]Kitchenham, B., and Charters, S., “Guidelines for performing systematic literature reviews in software engineering,” 2007.
[66]Awladthani, F. S., Porkodi, S., Saranya, R., and Pandurengan, V., “A Systematic Literature Review of the Adoption of a Blue Ocean Strategy by Small and Medium Enterprises for Sustainable Growth,” Journal of Sustainability Science and Management, vol. 18, no. 2, pp. 197-230, 2023. DOI: 10.46754/jssm.2023.02.014.
[67]Anthony, B., Kamaludin, A. and Romli, A., “Predicting academic staffs behaviour intention and actual use of blended learning in higher education: Model development and validation,” Technology, Knowledge and Learning, pp.1-47, 2021. DOI: 10.1007/s10758-021-09579-2.
[68]Razami, H.H. and Ibrahim, R., “Investigating the factors that influence the acceptance of MOOC as a supplementary learning tool in higher education,” Jour of Adv Research in Dynamical & Control Systems, vol. 12, no. 3, 2020. DOI: 10.5373/JARDCS/V12I3/20201219.
[69]Al-Azawei, A., Parslow, P. and Lundqvist, K., “Investigating the effect of learning styles in a blended e-learning system: An extension of the technology acceptance model (TAM),” Australasian Journal of Educational Technology, vol. 33, no. 2, 2017. DOI: 10.14742/ajet.2741.
[70]Alhramelah, A. and Alshahrani, H., “Saudi graduate student acceptance of blended learning courses based upon the unified theory of acceptance and use of technology,” Australian Educational Computing, vol. 35, no. 1, 2020.
[71]Al-Harazneh, Y.M., Alobeytha, F.L. and Alodwan, T.A.A., “Students' Perceptions of E-Learning Systems at the Jordanian Universities Through the Lens of E-Business Booming During the Coronavirus Pandemic,” International Journal of Distance Education Technologies (IJDET), 20(1), pp.1-18. DOI: 10.4018/IJDET.295981.
[72]Al Murshidi, G., “English as a Foreign Language Learning Students’ Perceptions of Blended Learning in University Institutions: A Case Study of a University in UAE,” Advances in Science, Technology and Engineering Systems Journal, vol. 5, no. 5, 2020. DOI: 10.25046/aj0505109.
[73]Prasad, P.W.C., Maag, A., Redestowicz, M. and Hoe, L.S., “Unfamiliar technology: Reaction of international students to blended learning,” Computers & Education, vol. 122, pp. 92-103, 2018. DOI: 10.1016/j.compedu.2018.03.016.
[74]Yeou, M., “An investigation of students’ acceptance of Moodle in a blended learning setting using technology acceptance model,” Journal of Educational Technology Systems, vol. 44, no. 3, pp.300-318, 2016. DOI: 10.1177/004723951561846.
[75]Sarkam, N.A., “Factors Affecting Levels of Acceptance of Academicians in Using Blended Learning (BL) System in Teaching by Using Extended Model of UTAUT,” Management Academic Research Society, 2019. DOI: 10.6007/IJARBSS/v9-i13/6510.
[76]Tran, K.N.N., “The Adoption of Blended E-learning Technology in Vietnam using a Revision of the Technology Acceptance Model,” Journal of Information Technology Education, vol. 15, 2016.
[77]Okocha, F., Eyiolorunshe, T.A. and Oguntayo, S.A., “Student Acceptance of Blended Learning in Nigeria: A Case Study of landmark University Students,” Advances in Multidisciplinary and Scientific Research, vol. 3, no. 1, 2017.
[78]Cooper, H., Hedges, L. V., and Valentine, J. C., “The handbook of research synthesis and meta-analysis,” 2nd edition. In The Hand. of Res. Synthesis and Meta-Analysis, 2nd Ed. (pp. 1-615). Russell Sage Foundation, 2009.
[79]Bowman, N. A., “Effect sizes and statistical methods for meta-analysis in higher education,” Research in Higher Education, vol. 53, no. 3, pp. 375–382, 2012. DOI: 10.1007/s11162- 011-9232-5.
[80]Higgins, J. P. T., and Thompson, S. G., “Quantifying heterogeneity in a meta-analysis,” Statistics in Medicine, vol. 21, no. 11, pp. 1539–1558, 2002. DOI: 10.1002/sim.1186.
[81]Megahed, N., and Hassan, A., “A blended learning strategy: reimagining the post-Covid-19 architectural education,”. Archnet-IJAR: International Journal of Architectural Research, vol. 16, no. 1, pp. 184-202, 2022. DOI: 10.1108/ARCH-04-2021-0081.
[82]Van Rhee, H. J., Suurmond, R., and Hak, T., “User manual for meta-essentials: Workbooks for meta-analysis,” Rotterdam, The Netherlands: Erasmus Research Institute of Management, 2015. DOI: 10.2139/ssrn.3241355.
[83]Suurmond R, van Rhee, H, Hak T., “Introduction, comparison and validation of MetaEssentials: A free and simple tool for meta-analysis,” Research Synthesis Methods. Vol. 8, no. 4, pp. 537-553, 2017. DOI: 10.1002/jrsm.1260.
[84]Harrison, J. S., Banks, G. C., Pollack, J. M., O’Boyle, E. H., and Short, J., “Publication bias in strategic management research,” Journal of Management, vol. 43, no. 2, pp. 400–425, 2017. DOI: 10.1177/0149206314535438.
[85]Sterne, J. A. C., Gavaghan, D., and Egger, M., “Publication and related bias in meta-analysis: Power of statistical tests and prevalence in the literature,” Journal of Clinical Epidemiology, vol. 53, no. 11, pp. 1119–1129, 2000. DOI: 10.1016/S0895-4356(00)00242-0.
[86]Egger, M., Smith, G.D., Schneider, M. and Minder, C., “Bias in meta-analysis detected by a simple, graphical test,” Bmj, vool. 315, no. 7109, pp. 629-634, 1997. DOI: 10.1136/bmj.315.7109.629.
[87]Chen, Z., Zhang, G., & Li, J., “Goodness-of-fit test for meta-analysis,” Scientific reports, vol. 5, no. 1, 16983, 2015. DOI: 10.1038/srep16983.