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Previous studies have shown that with important decisions, unconscious thought has surprisingly led to better choices than conscious thought. The present study challenges this so-called ‘deliberation-without-attention effect’ in the medical domain. In a computerized study, physicians and medical students were asked, after either conscious or unconscious thought, to estimate the 5-year survival probabilities of four fictitious patients with varying medical characteristics. We assumed that experienced physicians would outperform students as a result of their superior knowledge. The central question was whether unconscious thought in this task would lead to better performance in experts or novices, in line with the deliberation-without-attention effect. We created four fictitious male 60-year-old patients, each of whom with signs and symptoms related to likely prognosis, from 12 (Complex) or 4 (Simple) categories. This manipulation resulted in objectively different life expectancies for these patients. Participants (86 experienced physicians and 57 medical students) were randomly allocated to the Simple or Complex condition. Statements were randomly presented for 8 s. Next, each participant assessed the life expectancies after either conscious or unconscious thought. As expected, experienced physicians were better in assessing life expectancies than medical students. No significant differences were found in performance between conscious and unconscious thought, nor did we detect a significant interaction between expertise level and mode of thought. In a medical decision task, unconscious thought did not lead to better performance of experienced physicians or medical students than conscious thought. Our findings do not support the deliberation-without-attention effect.
Van den Bruel A, Thompson M, Buntinx F, Mant D. Clinicians’ gut feeling about serious infections in children: observational study. Br Med J. 2012;345:e6144 10.1136. CrossRef
Kahneman D, Slovic P, Tversky A. Judgment under uncertainty. New York: Cambridge University Press; 1982. CrossRef
Bargh J, Chartrand TL. The unbearable automaticity of being. Am Psychol. 1999;54:462–79. CrossRef
Dijksterhuis A, Nordgren LF. A theory of unconscious thought. Persp Psychol Sci. 2006;1:95–109. CrossRef
Dijksterhuis A, van Olden Z. On the benefits of thinking unconsciously: unconscious thought can increase post-choice satisfaction. J Exp Soc Psychol. 2006;42:627–31. CrossRef
González-Vallejo C, Lassiter GD, Bellezza FS, Lindberg MJ. ‘Save angels perhaps’: a critical examination of unconscious thought theory and the deliberation-without-attention effect. Rev Gen Psychol. 2008;12:282–96. CrossRef
González-Vallejo C, Phillips N. Predicting soccer matches: a reassessment of the benefit of unconscious thinking. Judgment Decis Making. 2010;5:200–6.
Newell BR, Wong KY, Cheung JC, Rakow T. Think, blink or sleep on it? The impact of modes of thought on complex decision making. Q J Exp Psychol. 2009;62:707–32. CrossRef
Aczel B, Lukacs B, Komlos J, Aitken MRF. Unconscious intuition or conscious analysis? Critical questions for the deliberation-without-attention paradigm. Judgm Decis Mak. 2011;6:351–8.
Acker F. New findings on unconscious versus conscious thought in decision making: additional empirical data and meta-analysis. Judgm Decis Mak. 2008;4:292–303.
- Conscious versus unconscious thinking in the medical domain: the deliberation-without-attention effect examined
Henk G. Schmidt
- Bohn Stafleu van Loghum