When Success Is Not Enough: The Symptom Base-Rate Can Influence Judgments of Effectiveness of a Successful Treatment

Frontiers in Psychology
Fernando BlancoHelena Matute

Abstract

Patients' beliefs about the effectiveness of their treatments are key to the success of any intervention. However, since these beliefs are usually formed by sequentially accumulating evidence in the form of the covariation between the treatment use and the symptoms, it is not always easy to detect when a treatment is actually working. In Experiments 1 and 2, we presented participants with a contingency learning task in which a fictitious treatment was actually effective to reduce the symptoms of fictitious patients. However, the base-rate of the symptoms was manipulated so that, for half of participants, the symptoms were very frequent before the treatment, whereas for the rest of participants, the symptoms were less frequently observed. Although the treatment was equally effective in all cases according to the objective contingency between the treatment and healings, the participants' beliefs on the effectiveness of the treatment were influenced by the base-rate of the symptoms, so that those who observed frequent symptoms before the treatment tended to produce lower judgments of effectiveness. Experiment 3 showed that participants were probably basing their judgments on an estimate of effectiveness relative to the symptom bas...Continue Reading

References

Dec 1, 1979·Journal of Experimental Psychology. General·L B Alloy, L Y Abramson
Jun 1, 1967·Journal of Abnormal Psychology·L J Chapman, J P Chapman
Jun 1, 1969·Journal of Abnormal Psychology·L J Chapman, J P Chapman
Sep 30, 1967·Nature·R S Moyer, T K Landauer
Nov 19, 2003·Journal of Experimental Psychology. Learning, Memory, and Cognition·Marc J BuehnerDeborah Clifford
Sep 20, 2005·Cognitive Psychology·Thomas L Griffiths, Joshua B Tenenbaum
Mar 10, 2006·Statistics in Medicine·Yu-Kang Tu, Mark S Gilthorpe
Nov 2, 2007·Psychonomic Bulletin & Review·José C Perales, David R Shanks
May 14, 2008·Journal of Experimental Psychology. General·Lorraine G AllanShepard Siegel
Jan 23, 2009·Psychological Review·Klaus FiedlerThorsten Meiser
May 12, 2009·Atencion primaria·Tatiana DillaJosé Antonio Sacristán
Jan 19, 2010·Psychonomic Bulletin & Review·Fernando BlancoMiguel A Vadillo
May 8, 2014·Medical Decision Making : an International Journal of the Society for Medical Decision Making·Nicolai BodemerGerd Gigerenzer
Jul 15, 2015·Perspectives on Psychological Science : a Journal of the Association for Psychological Science·Scott O LilienfeldRobert D Latzman
Dec 1, 2012·Psychological Science in the Public Interest : a Journal of the American Psychological Society·Stephan LewandowskyJohn Cook
Jul 21, 2015·Frontiers in Psychology·Helena MatuteItxaso Barberia
Nov 4, 2015·Frontiers in Psychology·Ulrich HoffrageGerd Gigerenzer
Mar 17, 2016·Scientific Reports·Yu-Kang Tu
Oct 7, 2016·Health Psychology Review·Benjamin Margolin RottmanWalid F Gellad
Jun 23, 2018·Psychological Research·Elisabet TubauÀngels Colomé
Mar 6, 2019·PloS One·Fernando Blanco, Helena Matute
Aug 6, 2019·Journal of Experimental Psychology. Animal Learning and Cognition·Helena MatuteMarcos Díaz-Lago
May 11, 2020·Social Science & Medicine·Fernando Blanco, Helena Matute
Jul 25, 2020·Journal of Medical Internet Research·María Manuela Moreno-Fernández, Helena Matute

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Citations

Feb 18, 2021·Scientific Reports·María Manuela Moreno-FernándezHelena Matute

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