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Volumn 16, Issue 8, 2013, Pages 604-612

Integrating technology readiness into the expectation-confirmation model: An empirical study of mobile services

Author keywords

[No Author keywords available]

Indexed keywords

ADULT; ANTICIPATION; ARTICLE; ATTITUDE; FEMALE; HUMAN; MALE; MOBILE PHONE; PSYCHOLOGICAL MODEL; TECHNOLOGY; UTILIZATION REVIEW; YOUNG ADULT;

EID: 84882624783     PISSN: 21522715     EISSN: 21522723     Source Type: Journal    
DOI: 10.1089/cyber.2012.0606     Document Type: Article
Times cited : (97)

References (63)
  • 1
    • 84865070815 scopus 로고    scopus 로고
    • Codiffusion of wireless voice and data services: An empirical analysis of the Japanese mobile telecommunications market
    • Niculescu MF, Whang S. Codiffusion of wireless voice and data services: An empirical analysis of the Japanese mobile telecommunications market. Information Systems Research 2012; 23:260-79
    • (2012) Information Systems Research , Issue.23 , pp. 260-279
    • Niculescu, M.F.1    Whang, S.2
  • 2
    • 48949092062 scopus 로고    scopus 로고
    • An assessment of advanced mobile services acceptance: Contributions from TAM and diffusion theory models
    • Lopez-Nicolas C, Molina-Castillo FJ, Bouwman H. An assessment of advanced mobile services acceptance: Contributions from TAM and diffusion theory models. Information & Management 2008; 45:359-64
    • (2008) Information & Management , vol.45 , pp. 359-364
    • Lopez-Nicolas, C.1    Molina-Castillo, F.J.2    Bouwman, H.3
  • 3
    • 0000998647 scopus 로고    scopus 로고
    • Understanding information systems continuance: An expectation- confirmation model
    • Bhattacherjee A. Understanding information systems continuance: An expectation-confirmation model. MIS Quarterly 2001; 25:351-70 (Pubitemid 33738440)
    • (2001) MIS Quarterly: Management Information Systems , vol.25 , Issue.3 , pp. 351-370
    • Bhattacherjee, A.1
  • 4
    • 34249940162 scopus 로고    scopus 로고
    • Theory of planning behavior (TPB) and customer satisfaction in the continued use of e-service: An integrated model
    • DOI 10.1016/j.chb.2006.05.006, PII S0747563206000768, Including the Special Issue: Education and Pedagogy with Learning Objects and Learning Designs
    • Liao C, Chen JL, Yen DC. Theory of planning behavior (TPB) and customer satisfaction in the continued use of e-service: An integrated model. Computers in Human Behavior 2007; 23:2804-22 (Pubitemid 46880140)
    • (2007) Computers in Human Behavior , vol.23 , Issue.6 , pp. 2804-2822
    • Liao, C.1    Chen, J.-L.2    Yen, D.C.3
  • 5
    • 76949087977 scopus 로고    scopus 로고
    • Understanding the role of an IT artifact in online service continuance: An extended perspective of user satisfaction
    • Kang YK, Lee H. Understanding the role of an IT artifact in online service continuance: An extended perspective of user satisfaction. Computers in Human Behavior 2010; 26: 253-364
    • (2010) Computers in Human Behavior , Issue.26 , pp. 253-364
    • Kang, Y.K.1    Lee, H.2
  • 6
    • 77955472086 scopus 로고    scopus 로고
    • Explaining usage of process modeling grammars: Comparing three theoretical models in the study of two grammars
    • Recker J. Explaining usage of process modeling grammars: Comparing three theoretical models in the study of two grammars. Information & Management 2010; 47:316-24
    • (2010) Information & Management , Issue.47 , pp. 316-324
    • Recker, J.1
  • 7
    • 79952994340 scopus 로고    scopus 로고
    • Exploring academic teachers' continuance toward the web-based learning system: The role of causal attributions
    • Hung MC, Chang IC, Hwang HG. Exploring academic teachers' continuance toward the web-based learning system: The role of causal attributions. Computers & Education 2011; 57:1530-43
    • (2011) Computers & Education , Issue.57 , pp. 1530-1543
    • Hung, M.C.1    Chang, I.C.2    Hwang, H.G.3
  • 8
    • 79954603532 scopus 로고    scopus 로고
    • Understanding antecedents of continuance intention in social-networking services
    • Kim B. Understanding antecedents of continuance intention in social-networking services. CyberPsychology, Behavior and Social Networking 2011; 14:199-205
    • (2011) CyberPsychology, Behavior and Social Networking , Issue.14 , pp. 199-205
    • Kim, B.1
  • 9
    • 80052803039 scopus 로고    scopus 로고
    • Smartphones as smart pedagogical tools: Implications for smartphones as u-learning devices
    • Shin D, Shin Y, Choo H, Beom K. Smartphones as smart pedagogical tools: Implications for smartphones as u-learning devices. Computers in Human Behavior 2011; 27:2207-14
    • (2011) Computers in Human Behavior , Issue.27 , pp. 2207-2214
    • Shin, D.1    Shin, Y.2    Choo, H.3    Beom, K.4
  • 10
    • 84860276080 scopus 로고    scopus 로고
    • The impact of distractions on the usability and intention to use mobile devices for wireless data services
    • Coursaris CK, Hassanein K, Head MM, Bontis N. The impact of distractions on the usability and intention to use mobile devices for wireless data services. Computers in Human Behavior 2012; 28:1439-49
    • (2012) Computers in Human Behavior , Issue.28 , pp. 1439-1449
    • Coursaris, C.K.1    Hassanein, K.2    Head, M.M.3    Bontis, N.4
  • 11
    • 84990328528 scopus 로고    scopus 로고
    • Technology readiness index (TRI): A multipleitem scale to measure readiness to embrace new technologies
    • Parasuraman A. Technology readiness index (TRI): A multipleitem scale to measure readiness to embrace new technologies. Journal of Service Research 2000; 2:307-20
    • (2000) Journal of Service Research , vol.2 , pp. 307-320
    • Parasuraman, A.1
  • 12
    • 0036400813 scopus 로고    scopus 로고
    • Technology and the customer interface: What consumers want in the physical and virtual store
    • DOI 10.1177/009207002236914
    • Burke R. Technology and the customer interface: What consumers want in the physical and virtual store. Journal of Academy of Marketing Science 2002; 30:411-32 (Pubitemid 40815802)
    • (2002) Journal of the Academy of Marketing Science , vol.30 , Issue.4 , pp. 411-432
    • Burke, R.R.1
  • 13
    • 0041413085 scopus 로고    scopus 로고
    • The influence of technology anxiety on consumer use and experiences with self-service technologies
    • Meuter ML, Ostrom AL, Bitner MJ, Roundtree R. The influence of technology anxiety on consumer use and experiences with self-service technologies. Journal of Business Research 2003; 56:899-907
    • (2003) Journal of Business Research , vol.56 , pp. 899-907
    • Meuter, M.L.1    Ostrom, A.L.2    Bitner, M.J.3    Roundtree, R.4
  • 14
    • 77955390358 scopus 로고    scopus 로고
    • Determinants of satisfaction and continuance intention towards self-service technologies
    • Chen SC, Chen HH, Chen MF. Determinants of satisfaction and continuance intention towards self-service technologies. Industrial Management & Data Systems 2009; 109:1248-63
    • (2009) Industrial Management & Data Systems , vol.109 , pp. 1248-1263
    • Chen, S.C.1    Chen, H.H.2    Chen, M.F.3
  • 15
    • 77955229569 scopus 로고    scopus 로고
    • Why provide an online review? An extended theory of planned behavior and the role of Big-Five personality traits
    • Picazo-Vela S, Chou SY, Meicher A, Pearson JM. Why provide an online review? An extended theory of planned behavior and the role of Big-Five personality traits. Computers in Human Behavior 2010; 26:685-96
    • (2010) Computers in Human Behavior , Issue.26 , pp. 685-696
    • Picazo-Vela, S.1    Chou, S.Y.2    Meicher, A.3    Pearson, J.M.4
  • 16
    • 33847242950 scopus 로고    scopus 로고
    • The effect of service employees' technology readiness on technology acceptance
    • Walczuch R, Lemmink J, Streukens S. The effect of service employees' technology readiness on technology acceptance. Information & Management 2007; 44:206-15
    • (2007) Information & Management , vol.44 , pp. 206-215
    • Walczuch, R.1    Lemmink, J.2    Streukens, S.3
  • 17
    • 42949118388 scopus 로고    scopus 로고
    • Understanding information systems continuance: The case of Internet-based learning technologies
    • DOI 10.1016/j.im.2008.02.005, PII S037872060800030X
    • Limayem M, Cheung CMK. Understanding information systems continuance: The case of internet-based learning technologies. Information & Management 2008; 45:227-32 (Pubitemid 351615161)
    • (2008) Information and Management , vol.45 , Issue.4 , pp. 227-232
    • Limayem, M.1    Cheung, C.M.K.2
  • 18
    • 34247352463 scopus 로고    scopus 로고
    • Explaining information technology usage: A test of competing models
    • Premkumar G, Bhattacherjee A. Explaining information technology usage: A test of competing models. Omega 2008; 36:64-75
    • (2008) Omega , vol.36 , pp. 64-75
    • Premkumar, G.1    Bhattacherjee, A.2
  • 19
    • 0000396442 scopus 로고
    • A cognitive model for the antecedents and consequences of satisfaction
    • Oliver RL. A cognitive model for the antecedents and consequences of satisfaction. Journal of Marketing Research 1980; 17:460-69
    • (1980) Journal of Marketing Research , vol.17 , pp. 460-469
    • Oliver, R.L.1
  • 20
    • 33646392335 scopus 로고    scopus 로고
    • The role of social presence and moderating role of computer self-efficacy in predicting the continuance usage of e-learning systems
    • Hayashi A, Chen C, Ryan T, Wu J. The role of social presence and moderating role of computer self-efficacy in predicting the continuance usage of e-learning systems. Journal of Information Systems Education 2004; 15:139-54
    • (2004) Journal of Information Systems Education , vol.15 , pp. 139-154
    • Hayashi, A.1    Chen, C.2    Ryan, T.3    Wu, J.4
  • 21
    • 55249087535 scopus 로고
    • Perceived usefulness, perceived ease of use, and user acceptance of information technology
    • Davis FD. Perceived usefulness, perceived ease of use, and user acceptance of information technology. MIS Quarterly 1989; 13:319-40
    • (1989) MIS Quarterly , vol.13 , pp. 319-340
    • Davis, F.D.1
  • 23
    • 1542382496 scopus 로고    scopus 로고
    • User acceptance of information technology: Toward a unified view
    • Venkatesh V, Morris MG, Davis GB, Davis FD. User acceptance of information technology: Toward a unified view. MIS Quarterly 2003; 27:425-78
    • (2003) MIS Quarterly , vol.27 , pp. 425-478
    • Venkatesh, V.1    Morris, M.G.2    Davis, G.B.3    Davis, F.D.4
  • 24
    • 84872398869 scopus 로고    scopus 로고
    • Information technology continuance research: Current state and future directions
    • Bhattacherjee A, Barfar A. Information technology continuance research: Current state and future directions. Asia Pacific Journal of Information Systems 2011; 21:1-18
    • (2011) Asia Pacific Journal of Information Systems , Issue.21 , pp. 1-18
    • Bhattacherjee, A.1    Barfar, A.2
  • 25
    • 34547312104 scopus 로고    scopus 로고
    • Integrating technology readiness into technology acceptance: The TRAM model
    • Lin CH, Shih HY, Sher PJ. Integrating technology readiness into technology acceptance: The TRAM model. Psychology and Marketing 2007; 24:641-57
    • (2007) Psychology and Marketing , vol.24 , pp. 641-657
    • Lin, C.H.1    Shih, H.Y.2    Sher, P.J.3
  • 26
    • 33846070118 scopus 로고    scopus 로고
    • The influence of technology readiness on satisfaction and behavioral intentions toward self-service technologies
    • Lin JC, Hsieh PL. The influence of technology readiness on satisfaction and behavioral intentions toward self-service technologies. Computers in Human Behavior 2007; 23:1597-615
    • (2007) Computers in Human Behavior , vol.23 , pp. 1597-1615
    • Lin, J.C.1    Hsieh, P.L.2
  • 28
    • 22144447886 scopus 로고    scopus 로고
    • An attribute-based model of quality satisfaction for internet self-service technology
    • DOI 10.1080/02642060500100833
    • Yen HR. An attribute-based model of quality satisfaction for Internet self-service technology. The Service Industries Journal 2005; 25:641-59 (Pubitemid 40975188)
    • (2005) Service Industries Journal , vol.25 , Issue.5 , pp. 641-659
    • Yen, H.R.1
  • 29
    • 34248585444 scopus 로고    scopus 로고
    • Usability of online services: The role of technology readiness and context
    • Massey AP, Khatri V, Montoya-Weiss MM. Usability of online services: The role of technology readiness and context. Decision Sciences 2007; 38:277-308
    • (2007) Decision Sciences , vol.38 , pp. 277-308
    • Massey, A.P.1    Khatri, V.2    Montoya-Weiss, M.M.3
  • 30
    • 31344440039 scopus 로고    scopus 로고
    • Technology readiness and the evaluation and adoption of self-service technologies
    • DOI 10.1016/j.jretconser.2005.08.004, PII S096969890500055X
    • Liljander V, Gillberg F, Gummerus J, van Riel A. Technology readiness and the evaluation and adoption of self-service technologies. Journal of Retailing and Consumer Services 2006; 13:177-91 (Pubitemid 43137120)
    • (2006) Journal of Retailing and Consumer Services , vol.13 , Issue.3 , pp. 177-191
    • Liljander, V.1    Gillberg, F.2    Gummerus, J.3    Van Riel, A.4
  • 31
    • 33748986377 scopus 로고    scopus 로고
    • The role of technology readiness in customers, perception and adoption of self-service technologies
    • Lin JC, Hsieh PL. The role of technology readiness in customers, perception and adoption of self-service technologies. International Journal of Service Industry Management 2006; 17:497-517
    • (2006) International Journal of Service Industry Management , vol.17 , pp. 497-517
    • Lin, J.C.1    Hsieh, P.L.2
  • 32
    • 33745556600 scopus 로고    scopus 로고
    • The effects of post-adoption beliefs on the expectation-confirmation model for information technology continuance
    • DOI 10.1016/j.ijhcs.2006.05.001, PII S1071581906000772
    • Thong JYL, Hong S, Tam KY. The effects of post-adoption beliefs on the expectation-confirmation model for information technology continuance. International Journal of Human- Computer Studies 2006; 64:799-810 (Pubitemid 43977890)
    • (2006) International Journal of Human Computer Studies , vol.64 , Issue.9 , pp. 799-810
    • Thong, J.Y.L.1    Hong, S.-J.2    Tam, K.Y.3
  • 33
    • 71549137163 scopus 로고    scopus 로고
    • Explaining and predicting users' continuance intention toward e-learning: An extension of the Expectation Confirmation Model
    • Lee MC. Explaining and predicting users' continuance intention toward e-learning: An extension of the Expectation Confirmation Model. Computers & Education 2010; 54:506-16
    • (2010) Computers & Education , Issue.54 , pp. 506-516
    • Lee, M.C.1
  • 34
    • 67649557443 scopus 로고    scopus 로고
    • Trust and satisfaction, two stepping stones for successful e-commerce relationships: A longitudinal exploration
    • KimDJ, FerrinDL, RaoHR. Trust and satisfaction, two stepping stones for successful e-commerce relationships: A longitudinal exploration. Information Systems Research 2009; 20:237-57
    • (2009) Information Systems Research , vol.20 , pp. 237-257
    • Kim, D.J.1    Ferrin, D.L.2    Rao, H.R.3
  • 35
    • 34248185092 scopus 로고    scopus 로고
    • An exploratory study on the continuance of mobile commerce: An extended expectationconfirmation model of information system use
    • Hung MC, Hwang HG, Hsieh TC. An exploratory study on the continuance of mobile commerce: An extended expectationconfirmation model of information system use. International Journal of Mobile Communications 2007; 5:409-22
    • (2007) International Journal of Mobile Communications , vol.5 , pp. 409-422
    • Hung, M.C.1    Hwang, H.G.2    Hsieh, T.C.3
  • 36
    • 40749134599 scopus 로고    scopus 로고
    • Extending the understanding of end user information systems satisfaction formation: An equitable needs fulfillment model approach
    • Au N, Ngai EWT, Cheng TCE. Extending the understanding of end user information system satisfaction formation: An equitable needs fulfillment model approach. MIS Quarterly 2008; 32:43-66 (Pubitemid 351378749)
    • (2008) MIS Quarterly: Management Information Systems , vol.32 , Issue.1 , pp. 43-66
    • Au, N.1    Ngai, E.W.T.2    Cheng, T.C.E.3
  • 37
    • 33750479041 scopus 로고    scopus 로고
    • Understanding continued information technology usage behavior: A comparison of three models in the context of mobile internet
    • DOI 10.1016/j.dss.2006.03.009, PII S0167923606000492
    • Hong SJ, Thong JYL, Tam KY. Understanding continued information technology usage behavior: A comparison of three models in the context of mobile Internet. Decision Support Systems 2006; 42:1819-34 (Pubitemid 44648452)
    • (2006) Decision Support Systems , vol.42 , Issue.3 , pp. 1819-1834
    • Hong, S.1    Thong, J.Y.L.2    Tam, K.Y.3
  • 39
    • 84862779114 scopus 로고    scopus 로고
    • Factors influencing the continuance intention to the usage of Web 2.0: An empirical study
    • Chen SC, Yen DC, Hwang MI. Factors influencing the continuance intention to the usage of Web 2.0: An empirical study. Computers in Human Behavior 2012; 28:933-41
    • (2012) Computers in Human Behavior , Issue.28 , pp. 933-941
    • Chen, S.C.1    Yen, D.C.2    Hwang, M.I.3
  • 40
    • 38549114187 scopus 로고    scopus 로고
    • How habit limits the predictive power of intention: The case of information systems continuance
    • Limayem M, Hirt SG, Cheung CMK. How habit limits the predictive power of intention: The case of information systems continuance. MIS Quarterly 2007; 31:705-37 (Pubitemid 351153309)
    • (2007) MIS Quarterly: Management Information Systems , vol.31 , Issue.4 , pp. 705-737
    • Limayem, M.1    Hirt, S.G.2    Cheung, C.M.K.3
  • 42
    • 84936823933 scopus 로고
    • User acceptance of computer technology: A comparison of two theoretical models
    • Davis FD, Bagozzi RP, Warshaw PR. User acceptance of computer technology: A comparison of two theoretical models. Management Science 1989; 35:982-1003
    • (1989) Management Science , vol.35 , pp. 982-1003
    • Davis, F.D.1    Bagozzi, R.P.2    Warshaw, P.R.3
  • 44
    • 41649112685 scopus 로고
    • Structural equation modeling in practice: A review and recommended two-step approach
    • Anderson JC, Gerbing DW. Structural equation modeling in practice: A review and recommended two-step approach. Psychological Bulletin 1988; 103:411-23
    • (1988) Psychological Bulletin , vol.103 , pp. 411-423
    • Anderson, J.C.1    Gerbing, D.W.2
  • 47
    • 0034295475 scopus 로고    scopus 로고
    • Confirmatory factor analyses of the full and short versions of the Marlowe-Crowne Social Desirablity Scale
    • Loo R, Thorpe K. Confirmatory factor analyses of the full and short versions of the Marlowe-Crowne Social Desirablity Scale. The Journal of Social Psychology 2000; 140:628-35
    • (2000) The Journal of Social Psychology , vol.140 , pp. 628-635
    • Loo, R.1    Thorpe, K.2
  • 49
    • 0001454849 scopus 로고
    • A confirmatory factor analysis of the end-user computing satisfaction instrument
    • Doll WJ, Xia W, Torkzadeh G. A confirmatory factor analysis of the end-user computing satisfaction instrument. MIS Quarterly 1994; 18:453-61
    • (1994) MIS Quarterly , vol.18 , pp. 453-461
    • Doll, W.J.1    Xia, W.2    Torkzadeh, G.3
  • 51
    • 67650706330 scopus 로고    scopus 로고
    • Cutoff criteria for fit indices in covariance structure analysis: Conventional criteria versus new alternatives
    • Hu L, Bentler PM. Cutoff criteria for fit indices in covariance structure analysis: Conventional criteria versus new alternatives. Structural Equation Modeling 1999; 6:1-55
    • (1999) Structural Equation Modeling , vol.6 , pp. 1-55
    • Hu, L.1    Bentler, P.M.2
  • 53
    • 4243159210 scopus 로고
    • Significance tests and goodness-offit in the analysis of covariance structures
    • Bentler PM, Bonett DG. Significance tests and goodness-offit in the analysis of covariance structures. Psychological Bulletin 1980; 88:588-606
    • (1980) Psychological Bulletin , vol.88 , pp. 588-606
    • Bentler, P.M.1    Bonett, D.G.2
  • 54
    • 0025397298 scopus 로고
    • Comparative fit indices in structural models
    • Bentler PM. Comparative fit indices in structural models. Psychological Bulletin 1990; 107:238-46
    • (1990) Psychological Bulletin , vol.107 , pp. 238-246
    • Bentler, P.M.1
  • 55
    • 0002704773 scopus 로고
    • A structural equation model of enduser satisfaction with a computer-based medical information systems
    • Henry JW, Stone RW. A structural equation model of enduser satisfaction with a computer-based medical information systems. Information Resources Management Journal 1994; 7:21-33
    • (1994) Information Resources Management Journal , vol.7 , pp. 21-33
    • Henry, J.W.1    Stone, R.W.2
  • 56
    • 0000009769 scopus 로고
    • Evaluating structural equation models with unobservable variables and measurement errors
    • Fornell CD, Larcker F. Evaluating structural equation models with unobservable variables and measurement errors. Journal of Marketing Research 1981; 18:39-50
    • (1981) Journal of Marketing Research , vol.18 , pp. 39-50
    • Fornell, C.D.1    Larcker, F.2
  • 58
    • 84970235764 scopus 로고
    • Self-reports in organizational research: Problems and prospects
    • Podsakoff PM, Organ DW. Self-reports in organizational research: Problems and prospects. Journal of Management 1986; 12:531-44
    • (1986) Journal of Management , vol.12 , pp. 531-544
    • Podsakoff, P.M.1    Organ, D.W.2
  • 59
    • 0032324652 scopus 로고    scopus 로고
    • Relationships between bases of power and work reactions: The mediational role of procedural justice
    • Mossholder KW, Bennett N, Kemery ER, Wesolowski MA. Relationships between bases of power and work reactions: The mediational role of procedural justice. Journal of Management 1998; 24:533-52 (Pubitemid 128180016)
    • (1998) Journal of Management , vol.24 , Issue.4 , pp. 533-552
    • Mossholder, K.W.1    Bennett, N.2    Kemery, E.R.3    Wesolowski, M.A.4
  • 60
    • 0002037905 scopus 로고
    • Asymptotic confidence intervals for indirect effects in structural equation models
    • Sobel ME. Asymptotic confidence intervals for indirect effects in structural equation models. Sociological Methodology 1982; 13:290-312
    • (1982) Sociological Methodology , vol.13 , pp. 290-312
    • Sobel, M.E.1
  • 61
    • 34548453393 scopus 로고    scopus 로고
    • Distribution of the product confidence limits for the indirect effect: Program PRODCLIN
    • MacKinnon DP, Fritz MS, Williams J, Lockwood CM. Distribution of the product confidence limits for the indirect effect: Program PRODCLIN. Behavior Research Methods 2007; 39:384-89
    • (2007) Behavior Research Methods , vol.39 , pp. 384-389
    • MacKinnon, D.P.1    Fritz, M.S.2    Williams, J.3    Lockwood, C.M.4
  • 62
    • 41749117940 scopus 로고    scopus 로고
    • Understanding Web-based learning continuance intention: The role of subjective task value
    • DOI 10.1016/j.im.2008.02.003, PII S0378720608000293
    • Chiu CM, Wang ETG. Understanding web-based learning continuance intention: The role of subjective task value. Information & Management 2008; 45:194-201 (Pubitemid 351491532)
    • (2008) Information and Management , vol.45 , Issue.3 , pp. 194-201
    • Chiu, C.-M.1    Wang, E.T.G.2
  • 63
    • 56949104196 scopus 로고    scopus 로고
    • Why do people use information kiosks? A validation of the unified theory of acceptance and use of technology
    • Wang YS, Shih YW. Why do people use information kiosks? A validation of the unified theory of acceptance and use of technology. Government Information Quarterly 2009; 26: 158-65
    • (2009) Government Information Quarterly , vol.26 , pp. 158-165
    • Wang, Y.S.1    Shih, Y.W.2


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