'Jumping to conclusions' bias in functional movement disorders

Journal of Neurology, Neurosurgery, and Psychiatry
Isabel PareesMark Edwards

Abstract

Patients with functional neurological disorders often report adverse physical events close to the onset of functional symptoms. However, the mechanism via which a triggering event may set off a functional condition is lacking. One possibility is that patients make abnormal inferences about novel information provided by physical triggering events. In this study, the authors aimed to specifically investigate whether patients with functional movement disorders have abnormalities in probabilistic reasoning. The authors used a well-studied probabilistic reasoning paradigm, 'the bead task', in 18 patients with functional movement disorders and 18 healthy agematched controls. The authors assessed the number of beads that participants needed to reach a decision and changes in the certainty of their decisions when confronted with confirmatory or contradictory evidence. Patients with functional movement disorders requested on average significantly fewer beads before reaching a decision than controls (3 vs 6 beads). When confronted with potentially disconfirmatory evidence, patients showed a significantly greater reduction in confidence in their estimates than controls. 40% of patients reached a decision after one or two beads whereas no ...Continue Reading

Citations

Sep 24, 2013·Current Neurology and Neuroscience Reports·Arpan R MehtaAnette E Schrag
May 30, 2012·Brain : a Journal of Neurology·Mark J EdwardsKarl J Friston
Oct 5, 2013·Continuum : Lifelong Learning in Neurology·Francesca MorganteAlberto J Espay
Jan 11, 2013·Journal of Neurology, Neurosurgery, and Psychiatry·Thomas A PollakAnthony S David
Aug 28, 2014·Brain : a Journal of Neurology·Isabel PareésMark J Edwards
Mar 13, 2014·Journal of Neurology, Neurosurgery, and Psychiatry·Benedetta DemartiniEileen Joyce
Apr 5, 2013·Movement Disorders : Official Journal of the Movement Disorder Society·Valerie VoonMark Hallett
Dec 11, 2014·The Clinical Neuropsychologist·Alfons van ImpelenThomas Merten
Oct 19, 2016·Movement Disorders : Official Journal of the Movement Disorder Society·Rachel NewbyPeter Kempster
Jun 1, 2018·Continuum : Lifelong Learning in Neurology·Anthony Feinstein
Mar 10, 2019·Journal of Neurology, Neurosurgery, and Psychiatry·Ibai DiezDavid L Perez
Aug 12, 2020·The Journal of Neuropsychiatry and Clinical Neurosciences·David L PerezUNKNOWN (On behalf of the American Neuropsychiatric Association Committee for Research
Jul 5, 2013·Current Opinion in Neurology·Mark J EdwardsIsabel Pareés
Feb 9, 2017·The International Journal of Neuropsychopharmacology·Alexander BrysonRichard Kanaan
Apr 27, 2018·Neuropsychologia·Indrit BèguePatrik Vuilleumier
Mar 17, 2021·Journal of Neurology, Neurosurgery, and Psychiatry·David L PerezW Curt LaFrance
Apr 14, 2021·Neuroscience and Biobehavioral Reviews·Primavera A SpagnoloMark Hallett
Apr 26, 2021·Parkinsonism & Related Disorders·Michele TinazziMirta Fiorio
Sep 26, 2019·Neurology·Christos GanosMark J Edwards

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