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Exploring how individuals complete the choice tasks in a discrete choice experiment: an interview study

BACKGROUND: To be able to make valid inferences on stated preference data from a Discrete Choice Experiment (DCE) it is essential that researchers know if participants were actively involved, understood and interpreted the provided information correctly and whether they used complex decision strateg...

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Autores principales: Veldwijk, Jorien, Determann, Domino, Lambooij, Mattijs S., van Til, Janine A., Korfage, Ida J., de Bekker-Grob, Esther W., de Wit, G. Ardine
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4839138/
https://www.ncbi.nlm.nih.gov/pubmed/27098746
http://dx.doi.org/10.1186/s12874-016-0140-4
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author Veldwijk, Jorien
Determann, Domino
Lambooij, Mattijs S.
van Til, Janine A.
Korfage, Ida J.
de Bekker-Grob, Esther W.
de Wit, G. Ardine
author_facet Veldwijk, Jorien
Determann, Domino
Lambooij, Mattijs S.
van Til, Janine A.
Korfage, Ida J.
de Bekker-Grob, Esther W.
de Wit, G. Ardine
author_sort Veldwijk, Jorien
collection PubMed
description BACKGROUND: To be able to make valid inferences on stated preference data from a Discrete Choice Experiment (DCE) it is essential that researchers know if participants were actively involved, understood and interpreted the provided information correctly and whether they used complex decision strategies to make their choices and thereby acted in accordance with the continuity axiom. METHODS: During structured interviews, we explored how 70 participants evaluated and completed four discrete choice tasks aloud. Hereafter, additional questions were asked to further explore if participants understood the information that was provided to them and whether they used complex decision strategies (continuity axiom) when making their choices. Two existing DCE questionnaires on rotavirus vaccination and prostate cancer-screening served as case studies. RESULTS: A large proportion of the participants was not able to repeat the exact definition of the risk attributes as explained to them in the introduction of the questionnaire. The majority of the participants preferred more optimal over less optimal risk attribute levels. Most participants (66 %) mentioned three or more attributes when motivating their decisions, thereby acting in accordance with the continuity axiom. However, 16 out of 70 participants continuously mentioned less than three attributes when motivating their decision. Lower educated and less literate participants tended to mention less than three attributes when motivating their decision and used trading off between attributes less often as a decision-making strategy. CONCLUSION: The majority of the participants seemed to have understood the provided information about the choice tasks, the attributes, and the levels. They used complex decision strategies (continuity axiom) and are therefore capable to adequately complete a DCE. However, based on the participants’ age, educational level and health literacy additional, actions should be undertaken to ensure that participants understand the choice tasks and complete the DCE as presumed. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s12874-016-0140-4) contains supplementary material, which is available to authorized users.
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spelling pubmed-48391382016-04-22 Exploring how individuals complete the choice tasks in a discrete choice experiment: an interview study Veldwijk, Jorien Determann, Domino Lambooij, Mattijs S. van Til, Janine A. Korfage, Ida J. de Bekker-Grob, Esther W. de Wit, G. Ardine BMC Med Res Methodol Research Article BACKGROUND: To be able to make valid inferences on stated preference data from a Discrete Choice Experiment (DCE) it is essential that researchers know if participants were actively involved, understood and interpreted the provided information correctly and whether they used complex decision strategies to make their choices and thereby acted in accordance with the continuity axiom. METHODS: During structured interviews, we explored how 70 participants evaluated and completed four discrete choice tasks aloud. Hereafter, additional questions were asked to further explore if participants understood the information that was provided to them and whether they used complex decision strategies (continuity axiom) when making their choices. Two existing DCE questionnaires on rotavirus vaccination and prostate cancer-screening served as case studies. RESULTS: A large proportion of the participants was not able to repeat the exact definition of the risk attributes as explained to them in the introduction of the questionnaire. The majority of the participants preferred more optimal over less optimal risk attribute levels. Most participants (66 %) mentioned three or more attributes when motivating their decisions, thereby acting in accordance with the continuity axiom. However, 16 out of 70 participants continuously mentioned less than three attributes when motivating their decision. Lower educated and less literate participants tended to mention less than three attributes when motivating their decision and used trading off between attributes less often as a decision-making strategy. CONCLUSION: The majority of the participants seemed to have understood the provided information about the choice tasks, the attributes, and the levels. They used complex decision strategies (continuity axiom) and are therefore capable to adequately complete a DCE. However, based on the participants’ age, educational level and health literacy additional, actions should be undertaken to ensure that participants understand the choice tasks and complete the DCE as presumed. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s12874-016-0140-4) contains supplementary material, which is available to authorized users. BioMed Central 2016-04-21 /pmc/articles/PMC4839138/ /pubmed/27098746 http://dx.doi.org/10.1186/s12874-016-0140-4 Text en © Veldwijk et al. 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Veldwijk, Jorien
Determann, Domino
Lambooij, Mattijs S.
van Til, Janine A.
Korfage, Ida J.
de Bekker-Grob, Esther W.
de Wit, G. Ardine
Exploring how individuals complete the choice tasks in a discrete choice experiment: an interview study
title Exploring how individuals complete the choice tasks in a discrete choice experiment: an interview study
title_full Exploring how individuals complete the choice tasks in a discrete choice experiment: an interview study
title_fullStr Exploring how individuals complete the choice tasks in a discrete choice experiment: an interview study
title_full_unstemmed Exploring how individuals complete the choice tasks in a discrete choice experiment: an interview study
title_short Exploring how individuals complete the choice tasks in a discrete choice experiment: an interview study
title_sort exploring how individuals complete the choice tasks in a discrete choice experiment: an interview study
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4839138/
https://www.ncbi.nlm.nih.gov/pubmed/27098746
http://dx.doi.org/10.1186/s12874-016-0140-4
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