The impacts of task complexity, overconfidence, confirmation bias, customer influence, and anchoring on variations in real estate valuations

    Chun-Chang Lee Affiliation
    ; Hsueh-Yung Lee Affiliation
    ; Wen-Chih Yeh Affiliation
    ; Zheng Yu Affiliation


Real estate valuation relies on real estate appraisers’ accurate assessments, which reflects the need to improve the objectivity of the valuation process. From the perspective of behavioral economics, appraisers are prone to numerous behavioral conflicts that could result in variations in their valuations. This study investigates the impacts of task complexity, overconfidence, confirmation bias, client influence, and anchoring on variations in real estate valuations. An online questionnaire was administered to 272 members of the Taiwan Real Estate Appraisers Association LINE group. Structural equation modeling was employed for analysis. A total of 150 valid responses were collected, yielding a valid response rate of 55.15%. The empirical results revealed that cognitive bias and client influence have significant and positive impacts on anchoring. Task complexity, overconfidence, and customer influence have significant and positive impacts on valuation variation. In addition to being the first study to explore the relationship between task complexity and valuation variation, this study also explored unconventional issues, such as the relationships between overconfidence, confirmation bias, and valuation variation. The results highlight the salience and value of behavioral economics-based analyses in empirical research on real estate valuation.

Keyword : task complexity, valuation variation, client influence, overconfidence, confirmation bias, anchoring

How to Cite
Lee, C.-C., Lee, H.-Y., Yeh, W.-C., & Yu, Z. (2022). The impacts of task complexity, overconfidence, confirmation bias, customer influence, and anchoring on variations in real estate valuations. International Journal of Strategic Property Management, 26(2), 141-155.
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Apr 27, 2022
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Achu, K. (2013). Client influence on property valuation: a literature review. International Journal of Real Estate Studies, 8(2), 24–47.

Adegoke, O. J. (2016). Effects of valuation variance and inaccuracy on Nigerian commercial property market. Journal of Property Investment & Finance, 34(3), 276–292.

Adegoke, O. J., Aluko, B. T., & Ajila, C. O. (2012). Relationship between the pattern of valuer heuristic behaviour and valuation variation. Journal of African Real Estate Research, 2(1), 110–130.

Allahverdyan, A. E., & Galstyan, A. (2014). Opinion dynamics with confirmation bias. PLoS ONE, 9(7), e99557.

Amidu, A. R., Aluko, B. T., & Hansz, J. A. (2008). Client feedback pressure and the role of estate surveyors and valuers. Journal of Property Research, 25(2), 89–106.

Armstrong, J. S., & Overton, T. S. (1977). Estimating nonresponse bias in mail surveys. Journal of Marketing Research, 14(3), 396–402.

Babawale, G. (2013). Valuation accuracy – the myth, expectation and reality! African Journal of Economic and Management Studies, 4(3), 387–406.

Babawale, G. K. (2011). Valuers’ and valuation firms’ characteristics as causes of inaccuracy in valuation in Nigeria. Mediterranean Journal of Social Sciences, 2(3), 12–23.

Babawale, G. K., & Omirin, M. (2012). An assessment of the relative impact of factors influencing inaccuracy in valuation. International Journal of Housing Markets and Analysis, 5(2), 145–160.

Baffour Awuah, K. G., & Gyamfi-Yeboah, F. (2017). The role of task complexity in valuation errors analysis in a developing real estate market. Journal of Property Research, 34(1), 54–76.

Bashir, T., Mehmood, F., & Khan, A. (2019). Comforting investments are rarely profitable: impediments in investor decision making. Global Social Sciences Review (GSSR), 4(2), 51–59.

Bellman, L. (2018). High-impact information types on market value: property appraisers’ information sources and assessment confidence. Journal of Property Research, 35(2), 139–163.

Bonner, S. (1994). A model of the effects of audit task complexity. Accounting, Organizations and Society, 19(3), 213–234.

Bonner, S. E. (2008). Judgment and decision making in accounting (1st ed.). Pearson/Prentice Hall.

Chapman, G. B., & Johnson, E. J. (2002). Incorporating the irrelevant: anchors in judgments of belief and value. Heuristics and Biases, 6, 120–138.

Cheek, N. N., & Norem, J. K. (2017). Holistic thinkers anchor less: exploring the roles of self-construal and thinking styles in anchoring susceptibility. Personality and Individual Differences, 115, 174–176.

Chen, F. Y. (2007). Impacts of client influence on real estate valuation (National Science Council-Subsidized Research Project Report, Project No.: NSC 95-2415-H-004-018-SSS).

Chiou, H. J. (2019). Qualitative research and statistical analysis: data analysis with SPSS and R by example (6th rev. ed.). Wunan Books Co.

Clement, B. M. (1999). Analyst forecast accuracy: do ability, resources, and portfolio complexity matter? Journal of Accounting and Economics, 27(3), 285–303.

Costa, D. F., de Melo Carvalho, F., de Melo Moreira, B. C., & do Prado, J. W. (2017). Bibliometric analysis on the association between behavioral finance and decision making with cognitive biases such as overconfidence, anchoring effect and confirmation bias. Scientometrics, 111(3), 1775–1799.

Crosby, N., Devaney, S., Lizieri, C., & McAllister, P. (2018). Can institutional investors bias real estate portfolio appraisals? Evidence from the market downturn. Journal of Business Ethics, 147(3), 651–667.

Eriksen, M. D., Fout, H. B., Palim, M., & Rosenblatt, E. (2020). Contract price confirmation bias: evidence from repeat appraisals. The Journal of Real Estate Finance and Economics, 60(1), 77–98.

Evans, K., Lausberg, C., & How, J. S. S. (2019). Reducing property appraisal bias with decision support systems: an experimental investigation in the South African property market. Journal of African Real Estate Research, 4(1), 108–138.

Fellner, G., & Krügel, S. (2012). Judgmental overconfidence: three measures, one bias? Journal of Economic Psychology, 33(1), 142–154.

Fornell, C., & Larcker, D. F. (1981). Evaluating structural equation models with unobservable variables and measurement error. Journal of Marketing Research, 18(1), 39–50.

Furnham, A., & Boo, H. C. (2011). A literature review of the anchoring effect. The Journal of Socio-Economics, 40(1), 35–42.

Gallimore, P. (1996). Confirmation bias in the valuation process: a test for corroborating evidence. Journal of Property Research, 13(4), 261–273.

Geltner, D. (1993). Estimating market values from appraised values without assuming an efficient market. Journal of Real Estate Research, 8(3), 325–345.

Gervais, S., Heaton, J. B., & Odean, T. (2002). The positive role of overconfidence and optimism in investment policy (Working Papers). The Rodney L. White Center for Financial Research.

Hair, J. F., Anderson, R. E., Tatham, R. L., & Black, W. C. (2009). Multivariate data analysis (7th ed.) Prentice Hall.

Hair, J. F., Black, W. C., & Babin, B. J. (1998). Multivariate data analysis (5th ed.). Prentice-Hall.

Hair, J. F., Black, W. C., Babin, B. J., Anderson, R. E., & Tatham R. L. (2006). Multivariate data analysis (6th ed.). Pearson.

Hair, J. F., Risher, J. J., Sarstedt, M., & Ringle, C. M. (2019). When to use and how to report the results of PLS-SEM. European Business Review, 31(1), 2–24.

Hammond, J. S., Keeney, R. L., & Raiffa, H. (1998). The hidden traps in decision making. Harvard Business Review, 76(5), 47–58.

Henseler, J., Ringle, C. M., & Sarstedt, M. (2015). A new criterion for assessing discriminant validity in variance-based structural equation modeling. Journal of the Academy of Marketing Science, 43(1), 115–135.

International Financial Reporting Standards. (n.d.).

Iroham, C. O., Ogunba, O. A., & Oloyede, S. A. (2013). Relative level of occurrence of the principal heuristics in Nigeria property valuation. International Journal of Development and Sustainability, 2(2), 493–504.

Iroham, C. O., Ogunba, O. A., & Oloyede, S. A. (2014). Effect of principal heuristics on accuracy of property valuation in Nigeria. Journal of Land and Rural Studies, 2(1), 89–111.

Kinnard, W. N., Lenk, M. M., & Worzala, E. M. (1997). Client pressure in the commercial appraisal industry: how prevalent is it? Journal of Property Valuation and Investment, 15(3), 233–244.

Klamer, P., Bakker, C., & Gruis, V. (2017). Research bias in judgement bias studies – a systematic review of valuation judgement literature. Journal of Property Research, 34(4), 285–304.

Klamer, P., Bakker, C., & Gruis, V. (2018). Complexity in valuation practice: an inquiry into valuers’ perceptions of task complexity in the Dutch real estate market. Journal of Property Research, 35(3), 209–233.

Kucharska-Stasiak, E. (2013). Uncertainty of property valuation as a subject of academic research. Real Estate Management and Valuation, 21(4), 17–25.

Kucharska-Stasiak, E., Źróbek, S., & Cellmer, R. (2018). Forms and effectiveness of the client’s influence on the market value of property-case study. Real Estate Management and Valuation, 26(3), 82–92.

Kumar, S., & Goyal, N. (2015). Behavioural biases in investment decision making – a systematic literature review. Qualitative Research in Financial Markets, 7(1), 88–108.

Lee, C. C., & Yu, C. Y. (2007). The study of the relationship among business ethics codes, ethical evaluation, ethical judgment and behavior intention-an example of the real estate brokers. City and Planning, 34(1), 13–37.

Lee, Y. H. (2005). Research on valuation decision behavior of real estate appraisers [Master’s thesis]. National Chengchi University Department of Land Economics, Taipei City.

Levy, D., & Schuck, E. (2005). The influence of clients on valuations: the clients’ perspective. Journal of Property Investment & Finance, 23(2), 182–201.

Liao, H. F., Chu, N. Y., & Peng, C. W. (2018). Awareness of independence of real estate appraisers: an empirical analysis. International Real Estate Review, 21(3), 295–316.

Ma, X. (2016). Research on real estate appraisal accuracy based on a behavior paradigm. ICCREM: BIM Application and Off-Site Construction, 1048–1055.

Małkowska, A., Uhruska, M., & Tomal, M. (2019). Age and experience versus susceptibility to client pressure among property valuation professionals implications for rethinking institutional framework. Sustainability, 11(23), 6759.

Ministry of the Interior. (2022). Real estate service and information system.

Mohammad, N. E., Ali, H. M., & Jasimin, T. H. (2018). Valuer’s behavioural uncertainties in property valuation decision making. Journal of the Malaysian Institute of Planners, 16(1), 239–250.

Moore, D. A., & Healy, P. J. (2008). The trouble with overconfidence. Psychological Review, 115(2), 502–517.

Mwasumbi, A. N., & Tarimo, D. I. (2019). The use of less relevant heuristics in mortgage valuations in Tanzania. Journal of African Real Estate Research, 4(1), 1–22.

Nunnally, J. C., & Bernstein, I. H. (1994). Psychometric theory (3rd ed.). McGraw Hill.

Nwuba, C. C., & Salawu, B. M. (2017). Valuers’ perception of the effect of client influence on valuation practice. ATBU Journal of Environmental Technology, 10(2), 47–62.

Nwuba, C. C., Egwuatu, U. S., & Salawu, B. M. (2015). Client influence on valuation: valuers’ motives to succumb. Journal of Property Research, 32(2), 147–172.

Podsakoff, P. M., MacKenzie, S. M., Lee, J., & Podsakoff, N. P. (2003). Common method variance in behavioral research: a critical review of the literature and recommended remedies. Journal of Applied Psychology, 88(5), 879–903.

Pompian, M. M. (2012). Behavioral finance and investor types. Wiley.

Presale housing prices continue to skyrocket. (n.d.).

Republic of China Real Estate Appraisers Association. (2022)

RICS/IPD. (2014). RICS IPD valuation and sale price report UK 2013. RICS/Investment Property Databank.

Salzman, D., & Zwinkels, R. C. J. (2013). Behavioural real estate (Discussion Paper No. TI 13-088/IV/DSF 57). Duisenberg School of Finance – Tinbergen Institute.

Tidwell, O. A., & Gallimore, P. (2014). The influence of a decision support tool on real estate valuation. Journal of Property Research, 31(1), 45–63.

Tversky, A., & Kahneman, D. (1974). Judgment under uncertainty: heuristics and biases. Science, 185(4157), 1124–1131.

Wofford, L., Troilo, M., & Dorchester, A. (2011). Real estate valuation, cognitive risk, and translational research. Journal of Property Investment & Finance, 29(4/5), 372–383.

Wyman, D., Seldin, M., & Worzala, E. (2011). A new paradigm for real estate valuation? Property Investment & Finance, 29(4/5), 341–358.

Yang, X. L., & Li, Z. (2016). Ambiguity vs risk: an experimental study of overconfidence, gender and trading activity. Journal of Behavioral and Experimental Finance, 9, 125–131.