The search for factors that influence user behavior has remained an important theme for both the academic and practitioner Information Systems Communities. In this paper we examine relevant user behaviors in the phase after adoption and investigate two factors that are expected to influence such behaviors, namely User Involvement (UI) and Personal Innovativeness in IT (PIIT). We conduct a field study to examine how these factors influence postadoption behavior and how they are interrelated. Building on theoretical premises and prior empirical findings, we propose and test two alternative models of the relationship between these factors. Our results reveal that the best explanation of post-adoption behavior is provided by the model where UI and PIIT independently influence post-adoption behavior. Our findings have important implications for research and practice. To that end, we offer directions for future research., {"references":["Agarwal, R. and Karahanna, E. \"Time Flies When You're Having Fun:\nCognitive Absorption and Beliefs about Information Technology\nUsage,\" MIS Quarterly (24:14), 2000, pp. 665-694.","Agarwal, R. and Prasad, J. \"A Conceptual and Operational Definition of\nPersonal Innovativeness in the Domain of Information Technology,\"\nInformation Systems Research (9:2), 1998, pp. 204-215.","Barki, H. and Hartwick, J. \"Rethinking the Concept of User\nInvolvement,\" MIS Quarterly (13:1), 1989, pp. 53-64.","Blili, S., Raymond, L. and Rivard, S. \"Impact of Task Uncertainty, End-\nUser Involvement, and Competence on the Success of End-User\nComputing,\" Information & Management (33), 1998, pp. 137-153.","Boffo, C. and Barki, H. \"Conceptualizing Information System Use: A\nBehavioral and Perceptual Framework,\" Unpublished paper, 2003,\nhttp://gresi.hec.ca/SHAPS/cp/gescah/formajout/ajout/test/uploaded/cahie\nr0305.pdf (accessed October 11, 2006).","Bommer, M. and Jalajas, D.S. \"The Threat of Organizational\nDownsizing on the Innovative Propensity of R&D Professionals,\" R&D\nManagement, (29:1), 1999, pp. 27-34.","Bostrom, R.P., Olfman, L. and Sein, M.K. \"The Importance of Learning\nStyle in End-User Training,\" MIS Quarterly (14:1),1990, pp. 101-119.","Bowman, B., Grupe, F.H., Lund, D. and Moore, W.D. \"An Examination\nof Sources of Support Preferred by End-User Computing Personnel,\"\nJournal of End User Computing (5:4), 1993, pp. 4-11.","Brancheau, J.C. and Wetherbe J.C. \"The Adoption of Spreadsheet\nSoftware: Testing Innovation Diffusion Theory in the Context of End-\nUser Computing,\" Information Systems Research (1:2), 1990, pp. 115-\n143.\n[10] Brown, C.V. and Bostrom, R.P. \"Organization Designs for the\nManagement of End-User Computing: Reexamining the Contingencies,\"\nJournal of Management Information Systems (10:4), 1994, pp. 183-211.\n[11] Carson, S.J., Madhok, A., Varman, R. and John, G. \"Information\nProcessing Moderators of the Effectiveness of Trust-Based Governance\nin Interfirm R&D Collaboration,\" Organization Science (14:1), 2003,\npp. 45-56.\n[12] Chau, P.Y.K. and Hui, K.L. \"Identifying Early Adopters of New IT\nProducts: A Case of Windows 95,\" Information & Management (33),\n1998, pp. 225-230.\n[13] DeLone, W.H., and McLean, E.R. \"The Delone and McLean Model\nof information systems success: A ten year update,\" Journal of\nManagement Information Systems (19:4), 2003, pp. 9-30.\n[14] Fishbein, M. and Ajzen, I. \"Attitudes toward Objects as Predictors of\nSingle and Multiple Behaviour Criteria,\" Psychological Review (81:1),\n1974, pp. 59-74.\n[15] Flynn, L.R, Goldsmith, R.E. and Eastman, J.K. \"Opinion Leaders\nand Opinion Seekers: Two New Measurement Scales,\" Journal of the\nAcademy of Marketing Science (24:2), 1996, pp. 137-147.\n[16] Fornell, C. and Larcker, D.F. \"Evaluating Structural Equation\nModels with Unobservable Variables and Measurement Error,\" Journal\nof Marketing Research (18) February, 1981, pp. 39-50.\n[17] Govindarajulu, C. \"The Status of Help Desk Support: A Survey,\"\nCommunications of the ACM (45:1), 2002, pp. 97-100.\n[18] Govindarajulu, C. and Reithel, B.J. \"Beyond the Information Center: an\nInstrument to Measure End-User Computing Support from Multiple\nSources,\" Information and Management (33:5), 1998, pp. 241-250.\n[19] Harris, D.P. An Investigation of the Factors Affecting Where Desktop\nComputer Users Go for Computer Support in an Academic Environment,\nUnpublished doctoral dissertation, Claremont Graduate University,\nUSA, 1994.\n[20] Hartwick, J. and Barki, H. \"Explaining the Role of User Participation in\nInformation System Use,\" Management Science (40:4), 1994, pp. 440-\n465.\n[21] Heide, J.B. \"Interorganizational Governance in Marketing Channels,\"\nJournal of Marketing (58), 1994, pp. 71-85.\n[22] Hwang, M.I. and Thorn, R.G. \"The Effect of User Engagement on\nSystem Success: A Meta-Analytical Integration of Research Findings,\"\nInformation & Management (35:4), 1999, pp. 229-236.\n[23] Hynes, N. and Lo, S. \"Innovativeness and Consumer Involvement in the\nChinese Market,\" Singapore Management Review (28:2), 2006, pp. 31-\n46.\n[24] Igbaria, M. and Iivari, J. \"Microcomputer Utilization Patterns Among\nManagers and Professionals: The Case in Finland,\" Journal of Computer\nInformation Systems (38:3), 1998, pp. 28-43.\n[25] Jasperson J., Carter P.E. and Zmud R.W. \"A comprehensive\nconceptualization of post-adoption behaviours associated with\ninformation technology enabled work systems,\" MIS Quarterly (29:3),\n2005, pp. 525-557.\n[26] Kappelman, L.A. \"User Training, User Involvement, and IS\nImplementation Success,\" Journal of Computer Information Systems\n(36:3), 1996, pp. 1-9.\n[27] Limayem, M., Khalifa, M., and Frini, A. \"What Makes Consumers Buy\nfrom Internet? A Longitudinal Study of Online Shopping,\" IEEE\nTransactions on Systems Man and Cybernetics Part A: Systems and\nHumans (30), 2000, pp. 421-432.\n[28] Mittal, B. \"A Comparative Analysis of Four Scales of Consumer\nInvolvement,\" Psychology and Marketing (12:7), 1995, pp. 663-682.\n[29] Munro, M.C., Huff, S.L., Marcolin, B.L. and Compeau, D.R.\n\"Understanding and Measuring User Competence,\" Information &\nManagement (33:1), 1997, pp. 45-57.\n[30] Nilsen, H. and Sein, M.K. \"Determinants of User Satisfaction with the\nSupport Function,\" Proceedings of the 2002 ACMSIGCPR Conference,\n2002, pp. 47-51.\n[31] Nunnally, J.C. Psychometric Theory, McGraw Hill, New York, 1978.\n[32] Ram, S. and Jung, H-S. \"The Link Between Involvement, Use\nInnovativeness and product Usage,\" Advances in Consumer Research\n(16), 1989, pp. 160-166.\n[33] Rogers, E.M and Shoemaker, E. Communication of Innovations, A\ncross-cultural approach, The Free Press, 2nd edition, New York, 1971.\n[34] Schillewaert, N., Ahearne, M.J., Frambach, R.T. and Moenaert, R.K.\n\"The adoption of information technology in the sales force,\" Industrial\nMarketing Management (34:4), 2005, pp. 323-336.\n[35] Schneider, K.C. and Rodgers, W.C. \"An ÔÇÿImportance- Subscale for\nConsumer Involvement Profiles,\" Advances in Consumer Research (23),\n1996, pp. 249-254.\n[36] Seddon, P.B., Staples, D.S., Patnayakuni, R. and Bowtell, M.\n\"Dimensions of Information Systems Success,\" Communications of the\nAIS (2:20), http://cais.isworld.org/articles/2-20/article.htm (accessed\nOctober 11, 2006), 1999.\n[37] Singletary, L.A., Akbulut, A.Y., and Houston, A.L. \"Unanticipated\nSoftware Use by Adolescents Following Mandatory Adoption,\"\nProceedings from the Twenty-Third International Conference on\nInformation Systems, Barcelona, Spain, December, 2002.\n[38] Speier, C. and Brown, C.V. \"Differences in End-User Computing\nSupport and Control Across User Departments,\" Information &\nManagement (32), 1997, pp. 85-99.\n[39] Thatcher, J.B. and Perrewe, P.L. \"An empirical examination of\nindividual traits as antecedents to computer anxiety and computer selfefficacy,\"\nMIS Quarterly (26:4), 2002, pp 381-396.\n[40] Whitley, B.E. \"Gender Differences in Computer-Related Attitudes and\nBehaviour: A Meta-Analysis,\" Computers in Human Behaviour (13:1),\n1997, pp. 1-22.\n[41] Wolfradt, U., and Doll, J. \"Motives of Adolescents to Use the Internet as\na Function of Personality Traits, Personal and Social Factors,\" Journal\nof Educational Computing Research (24:1), 2001, pp. 13-27."]}