Supramono Supramono, Marisa Wandita


Overconfidence caused investors to overestimate their knowledge, underestimate risk and exaggerate their ability to control events. This led to excessive trading, unwarranted risk-taking, and ultimately, financial losses. The aim of this study was to analyze the relationship between overconfidence and confirmation bias and self-attribution bias. The subjects in this experiment were 53 students in finance classes at the Faculty of Economic and Business. Data that had been collected was analyzed using descriptive and inferential analysis techniques using bivariate correlation. The result of this study showed that there was a positive relationship between confirmation bias and overconfidence. However, there was no positive relationship between self-attribution bias and overconfidence.


Overconfidence, Confirmation Bias, Self-Attribution Bias


Ackert, L.F. & Deaves, R. 2010. Behavioral Finance: Psychology, Decision-making, and Markets. Ohio: South-Western Cengage Learning.

Barber, B.M. & Odean, T. 2001. Boys Will be Boys: Gender, Overconfidence, and Common Stock Investment. The Quarterly Journal of Economics, 261-292.

Baker, K.H. & Nofsinger, J.R. 2002. Psychology Biases of Investors. Financial Services Review, 11(2): 97-116.

Berita Satu. 2016. Pacu Sosialisasi Pasar Modal, BEI akan Tambah 45 Gallery Investasi. Diakses tanggal 19 Febuari 2016.

Biais, B., Hilton, D., Mazurier, K., & Pouget, S. 2005. Judgemental Overconfidence, Self-Monitoring and Trading Performance in an Experimental Financial Market. The Review of Economic Studies, 72(2): 287–312.

Bhandari, G. & Deaves, R. 2006. The Demographics of Overconfidence. The Journal of Behavioral Finance, 7(1): 5-11.

Campbell, D.T. & Stanley, J.C. 1966. Experimental and Quasi-Experimental Design for Research. Boston: Houghton Mifflin Company.

Cremers, M. & Pareek, A. 2011. Can Overconfidence and Biased Self-Attribution Explain The Momentum, Reversal and Shares Issuance Anomalies? Evidence From Short-Term Institutional Investors. SSRN Electronic Journal.

Doukas, J.A. & Petmezas, D. 2007. Acquisition, Overconfident Managers, and Self-Attribution Bias. European Financial Management 13(3): 531-577.

Garveis, S. & Odean, T. 2001. Learning to be Overconfident. The Review of Financial Studies, 14(1): 1-27.

Glaser, M. & Weber, M. 2003. Momentum and Turnover: Evidence from the German Stock Market. Schmalenbach Business Review, 55(2): 108–135.

Hirschey, M. & Nofsinger, J. 2008. Investments: Analysis and Behavior. New York: McGraw-Hill.

Hirshleifer, D. 2001. Investor Psychology and Asset Pricing. The Journal of The American Finance Association, 56(4): 1533-1597.

Hoffman, A.O.I. & Post, T. 2013. Self-Attribution Bias in Consumer Financial Decision-Making: How Investment Returns Affect Individuals’Belief in Skill. Journal of Behavioral and Experimental Economics, 52: 23-28.

Howard, J.A. 2012. Behavioral Finance: Contributions of Cognitive Psychology and Neuroscience to Decision Making. Journal of Organizational Psychology, 12(2): 52-70.

Hsu, Y. & Shiu, C.Y. 2007. The Overconfidence and Self-Attribution Bias of Investors in the Primary Market. Pacific-Basin Finance Journal, 18(2): 217-239.

Koriat, A., Lichtenstein, S., & Fischhoff, B. 1980. Reasons for Confidence. Journal of Experimental Psychology: Human Learning and Memory, 6(2): 107–118.

Kreitner, R. & Kinicki, A. 2001. Fundamentals of Organizational Behaviour. Fifth Edition. New York: McGraw-Hill.

Fischhoff, B., Slovic, P., & Lichtenstein, S. 1977. Knowing with Certainty: The Appropriateness of Extreme Confidence. Journal of Experimental Psychology: Human Perception and Performance, 3(4): 552-564.

Li, F. 2012. Managers Self-Serving Attribution Bias and Corporate Financial Policies. Advanced Institute of Finance Shanghai Jiaotong University.

Miller, D.T. & Ross, M. 1975. Self-Serving Biases in the Attribution of Causality: Fact or Fiction? Psychological Bulletin, 82(2): 213-225.

Nahartyo, E. 2013. Desain dan Implementasi Riset Eksperimen. Edisi Kedua. Yogyakarta: UPP STIM YKPN.

Nickerson, R.S. 1998. Confirmation Bias: A Ubiquitous Phenomenon in Many Guises. Review of General Psychology, 2(2): 175–220.

Nofsinger, J.R. 2005. The Psychology of Investing. Second Edition. New Jersey: Pearson Education.

Park, J., Konana, P., Gu, B., Kumar, A., & Raghunathan, R. 2010. Confirmation Bias, Overconfidence, and Investment Performance: Evidence from Stock Market Boards. McCombs Research Paper Series, 7-10.

Pompian, M.M. 2006. Behavioral Finance & Wealth Management: How to Build Optimal Portfolios That Account for Investor Biases. New Jersey: John Wiley & Sons Inc.

Pompian, M.M. 2012. Behavior Finance and Investor Types Managing Behavior to Make Better Investment Decisions. New Jersey: John Wiley & Sons Inc.

Kosnik, L.R.D. 2007. Refusing to Budge: A Confirmatory Bias in Decision Making? Mind & Society, 7(2): 193-214.

Rotter, J.B. 1992. Cognates of Personal Control: Locus of Control, Self-Efficacy, and Explanatory Style. Applied and Preventive Psychology, 1(2): 111-117.

Sieck, W.R. & Arkes, H.R. 2005. The Recalcitrance of Overconfidence and Its Contribution to Decision Aid Neglect. Journal of Behavioral Decision Making, 18(1): 29-53.

Sulphey, M.M. 2014. Behavioural Finance. Delhi: PHI Learning Private Limited.

Hattu, E.M. 2013. Self-Attribution Bias dan Faktor Demografi dalam Pengambilan Keputusan Trading Valuta Asing. Thesis. Fakultas Ekonomi dan Bisnis Universitas Kristen Satya Wacana.

Statman, M., Thorley, S., & Vorkink K. 2003. Investor Overconfidence and Trading Volume. The Review of Financial Studies, 19(4): 1531-1565.

Taylor, S.E. & Brown, J.D. Illusion and Well-Being: A Social Psychological Perspective on Mental Health. Psychological Bulletin, 103(2): 193-210.

Tine, D.C. 2013. Attribution Bias and Overconfidence in Escalation of Commitment: The Role of Desire to Rectify Past Outcomes. Scholar Works Georgia State University.

Turner, R.N. & Hewstone, M. 2012. Attribution Biases. Encyclopedia of Group Processes & Intergroup Relations Sage Publication, 43-46.

Zuckerman, M. 1979. Attributions of Success and Failure Revisited, or The Motivational Bias is Alive and Well in Attribution Theory. Journal of Personality, 47(2): 245-287.

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Jurnal Keuangan dan Perbankan (Journal of Finance and Banking)

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