Statistical Approach to Identify Stress and Biases Impairing Decision-Making in High-Risk Industry

Decision-making occurs several times an hour when working in high risk industry and an erroneous choice might have undesirable outcomes for people and the environment surrounding the industrial plant. Industrial decisions are very often made in a context of acute stress. Time pressure is a crucial stressor leading decision makers sometimes to boost up the decision-making process and if it is not possible then shift to the simplest strategy. We thus found it interesting to update the characterization of the stress factors impairing decision-making at Chinon Nuclear Power Plant (France) in order to optimize decision making contexts and/or associated processes. The investigation was based on the analysis of reports addressing safety events over the last 3 years. Among 93 reports, those explicitly addressing decision-making issues were identified. Characterization of each event was undertaken in terms of three criteria: stressors, biases impairing decision making and weaknesses of the decision-making process. The statistical analysis showed that biases were distributed over 10 possibilities among which the hypothesis confirmation bias was clearly salient. No significant correlation was found between criteria. The analysis indicated that the main stressor was time pressure and highlights an unexpected form of stressor: the trust asymmetry principle of the expert. The analysis led to the conclusion that this stressor impaired decision-making from a psychological angle rather than from a physiological angle: it induces defensive bias of self-esteem, self-protection associated with a bias of confirmation. This leads to the hypothesis that this stressor can intervene in some cases without being detected, and to the hypothesis that other stressors of the same kind might occur without being detected too. Further investigations addressing these hypotheses are considered. The analysis also led to the conclusion that dealing with these issues implied i) decision-making methods being well known to the workers and automated and ii) the decision-making tools being well known and strictly applied. Training was thus adjusted.

• Ph. Fauquet-Alekhine

• Bias
• expert
• high risk industry
• stress.

[1] American Institute of Stress, Attitudes in the American Workplace VII. Yonkers, NY: AIS, 2001.
[2] J. Xiao, S. Guan, H. Ge, N. Tao, Y. Zhang, Y. Jiang, ... & Lian, Y, "The impact of changes in work stressors and coping resources on the risk of new-onset suicide ideation among Chinese petroleum industry workers", Journal of psychiatric research, vol. 88, pp. 1-8, 2017.
[3] R. Bronner, Decision making under time pressure. Toronto: Lexington Books, 1982.
[4] K. Gok, & N. Atsan, "Decision-making under stress and its implications for managerial decision-making: a review of literature", International Journal of Business and Social Research, vol. 6, no 3, pp. 38-47, 2016.
[5] IAEA, Applications of probabilistic safety assessment (PSA) for nuclear power plants. Report refernce: IAEA-TECDOC-1200. Vienna: International Atomic Energy Agency, 2001.
[6] P. Slovic, "Perceived risk, trust, and democracy", Risk analysis, vol. 13, no 6, pp. 675-682, 1993.
[7] I. Yaniv, & E. Kleinberger, "Advice taking in decision making: Egocentric discounting and reputation formation", Organizational behavior and human decision processes, 2000, vol. 83, no 2, pp. 260-281, 2000.
[8] P. Shafto, & J.D. Coley, "Development of categorization and reasoning in the natural world: Novices to experts, naïve to similarity to ecological knowledge", Journal of Experimental Psychology: Learning, Memory, and Cognition, vol. 29, no. 4, pp. 641–649, 2003.
[9] G.A. Klein, "Recognition-primed decision (RPD)" in Advances in manmachine systems, W.B. Rouse, Ed. Greenwich, CT: JAI, 1989, pp. 47-92.
[10] A.F. Stokes, K.L. Kemper, & R. Marsh, R, Time-stressed flight decision making: A study of expert and novice aviators (Technical Report ARL-93-1/INEL-93-1). Urbana-Champaign, IL: Aviation Research Laboratory, University of Illinois, 1992.
[11] J.G. Raaijmakers, "Decision making under mental and physical stress", TNO Institute for Human Factors, vol. 5, 1990.
[12] A.D. Fisk, & M.W. Scerbo, "Automatic and control processing approach to interpreting vigilance performance: A review and reevaluation", Human Factors, vol. 29, pp. 653-660, 1987.
[13] A.D. Fisk, & W. Schneider, "Type of task practice and time-sharing activities predict performance deficits due to alcohol ingestion" in Proceedings of the Human Factors Society 26th Annual Meeting. Santa Monica, CA: Human Factors Society, 1982.
[14] P.A. Hancock, "Environmental stressors" in Sustained attention in human performance, J.S. Warm, Ed. London: Wiley, 1984.
[15] W. Schneider, & A.D. Fisk, "Automatic category search and its transfer", Journal of Experimental Psychology: Learning, Memory, and Cognition, vol. 10, pp. 1-15, 1984.
[16] C. Dejours. "Contributions of the psychodynamic analysis of work situations to the study of organizational crises", Industrial & Environmental Crisis Quarterly, vol. 7, no 2, pp. 77-89, 1993.
[17] C. Dejours, Travail usure mentale (essai de psychopathologie du travail). Paris: Bayard, 2000.
[18] P. Sylvers, S.O. Lilienfeld, & J.L. LaPrairie, "Differences between trait fear and trait anxiety: Implications for psychopathology", Clinical psychology review, 2011, vol. 31, no 1, p. 122-137.
[19] Davis, M, "Are different parts of the extended amygdala involved in fear versus anxiety?" Biological Psychiatry, vol. 44, pp. 1239-1247, 1998.
[20] N. McNaughton, & P.J. Corr, P. J. "A two-dimensional neuropsychology of defense: Fear/anxiety and defensive distance" Neuroscience & Biobehavioral Review, vol. 28, pp. 285−305, 2004.
[21] APA, Diagnostic and Statistical Manual of Mental Disorders (Fifth ed.). Arlington, VA: American Psychiatric Publishing, 2013, p. 189.
[22] E. Ruiz-Padial, & J. Vila, "Fearful and sexual pictures not consciously seen modulate the startle reflex in human beings" Biological Psychiatry, vol. 61, pp. 996-1001, 2007.
[23] S.M. Rodrigues, J.E. LeDoux, & R.M. Sapolsky, "The influence of stress hormones on fear circuitry" Annual review of neuroscience, vol. 32, pp. 289-313, 2009.
[24] J.A.K. Erskine, "Resilience to stress" Proceedings of the 25th Multidisciplinary International Neuroscience and Biological Psychiatry Conference “Stress and Behavior”, St-Petersburg, 2019, p. 23.
[25] V.N. Luine, R.E. Bowman, & P.A. Serrano, "Sex Differences in Acute Stress Effects on Spatial Memory and Hippocampal Synaptic Neurochemicals" Understanding Stress at Work, 52-56, 2017.