Explaining placebo effects in an online survey study: Does ‘Pavlov’ ring a bell?

• Rosanne M. Smits ,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Visualization, Writing – original draft

  * E-mail: R.M.Smits@fsw.leidenuniv.nl

  Affiliations Health, Medical and Neuropsychology unit, Leiden University, Leiden, The Netherlands, Leiden Institute for Brain and Cognition, Leiden, The Netherlands, Pediatric Immunology and Rheumatology, Wilhelmina Children’s Hospital, Utrecht, The Netherlands

  https://orcid.org/0000-0003-2682-2654

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• Dieuwke S. Veldhuijzen,

  Roles Conceptualization, Funding acquisition, Methodology, Supervision, Writing – review & editing

  Affiliations Health, Medical and Neuropsychology unit, Leiden University, Leiden, The Netherlands, Leiden Institute for Brain and Cognition, Leiden, The Netherlands, Pediatric Immunology and Rheumatology, Wilhelmina Children’s Hospital, Utrecht, The Netherlands

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• Tim Olde Hartman,

  Roles Conceptualization, Writing – review & editing

  Affiliation Department of Primary and Community Care, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, The Netherlands

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• Kaya J. Peerdeman,

  Roles Conceptualization, Writing – review & editing

  Affiliations Health, Medical and Neuropsychology unit, Leiden University, Leiden, The Netherlands, Leiden Institute for Brain and Cognition, Leiden, The Netherlands

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• Liesbeth M. Van Vliet,

  Roles Conceptualization, Writing – review & editing

  Affiliations Health, Medical and Neuropsychology unit, Leiden University, Leiden, The Netherlands, Leiden Institute for Brain and Cognition, Leiden, The Netherlands

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• Henriët Van Middendorp,

  Roles Conceptualization, Writing – review & editing

  Affiliations Health, Medical and Neuropsychology unit, Leiden University, Leiden, The Netherlands, Leiden Institute for Brain and Cognition, Leiden, The Netherlands

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• Ralph C. A. Rippe,

  Roles Conceptualization, Formal analysis, Methodology, Writing – review & editing

  Affiliation Research Methods and Statistics, Institute of Education and Child Studies, Leiden University, Leiden, The Netherlands

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• Nico M. Wulffraat,

  Roles Writing – review & editing

  Affiliation Pediatric Immunology and Rheumatology, Wilhelmina Children’s Hospital, Utrecht, The Netherlands

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• Andrea W. M. Evers

  Roles Conceptualization, Funding acquisition, Methodology, Supervision, Writing – review & editing

  Affiliations Health, Medical and Neuropsychology unit, Leiden University, Leiden, The Netherlands, Leiden Institute for Brain and Cognition, Leiden, The Netherlands, Department of Psychiatry, Leiden University Medical Center, Leiden, The Netherlands

  https://orcid.org/0000-0002-0090-5091

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