Conscious thought beats deliberation without attention in diagnostic decision-making: at least when you are an expert

Silvia Mamede*, Henk G. Schmidt, Remy M. J. P. Rikers, Eugene J. F. M. Custers, Ted A. W. Splinter, Jan L. C. M. van Saase

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


Contrary to what common sense makes us believe, deliberation without attention has recently been suggested to produce better decisions in complex situations than deliberation with attention. Based on differences between cognitive processes of experts and novices, we hypothesized that experts make in fact better decisions after consciously thinking about complex problems whereas novices may benefit from deliberation-without-attention. These hypotheses were confirmed in a study among doctors and medical students. They diagnosed complex and routine problems under three conditions, an immediate-decision condition and two delayed conditions: conscious thought and deliberation-without-attention. Doctors did better with conscious deliberation when problems were complex, whereas reasoning mode did not matter in simple problems. In contrast, deliberation-without-attention improved novices' decisions, but only in simple problems. Experts benefit from consciously thinking about complex problems; for novices thinking does not help in those cases.
Original languageEnglish
Pages (from-to)586-592
JournalPsychological Research
Issue number6
Publication statusPublished - Nov 2010

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