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Sound of the crowd: wisdom of neurologists revisited
  1. Thanuja Dharmadasa1,
  2. Matthew C. Kiernan2,3
  1. 1 Nuffield Department of Clinical Neurosciences, Oxford University, Oxford, UK
  2. 2 Brain and Mind Centre, The University of Sydney, Sydney, New South Wales, Australia
  3. 3 Department of Neurology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
  1. Correspondence to Dr Thanuja Dharmadasa, Nuffield Department of Clinical Neurosciences, Oxford University, Oxford OX3 9DU, UK; thanuja.dharmadasa{at}

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The notion that a group’s judgement may be superior to that of the individual continues to promote discussion.1 A study in Practical Neurology investigated the collective ‘wisdom of neurologists’ by analysing the distribution of 110 estimates of the master of ceremonies and presidential combined speech duration at the 2013 annual dinner of the Association of British Neurologists (ABN).2 That study emphasised a respect for cognitive divergence, whereby the inclusion of apparently anomalous estimates of the mean produced a more accurate prediction of the result (24 min and 30 s).

We conducted a similar experiment …

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