Applying qualitative methods to experimental designs: A tutorial for the behavioral sciences.

Studies with experimental designs are almost invariably evaluated with quantitative outcomes and methods, both in behavioral sciences and other disciplines. We argue that there can be added value of using qualitative methods for the evaluation of (behavioral) experiments. Incorporating qualitative d...

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Main Authors: Hidde Jelmer Leplaa, Jari A Tönjes, Mariska Bouterse, Karlijn F B Soppe, Irene Klugkist
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2025-01-01
Series:PLoS ONE
Online Access:https://doi.org/10.1371/journal.pone.0324936
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author Hidde Jelmer Leplaa
Jari A Tönjes
Mariska Bouterse
Karlijn F B Soppe
Irene Klugkist
author_facet Hidde Jelmer Leplaa
Jari A Tönjes
Mariska Bouterse
Karlijn F B Soppe
Irene Klugkist
author_sort Hidde Jelmer Leplaa
collection DOAJ
description Studies with experimental designs are almost invariably evaluated with quantitative outcomes and methods, both in behavioral sciences and other disciplines. We argue that there can be added value of using qualitative methods for the evaluation of (behavioral) experiments. Incorporating qualitative data can enhance the ecological validity of a study, by acquiring a more holistic understanding of the phenomenon of interest. There is, however, little methodological guidance on how to implement such an approach. In this paper we present the different steps and considerations for a qualitative evaluation of results in experimental designs. Methodological guidelines are offered for each stage of a study, from formulation of the research goals, through data collection and data analysis, to the interpretation of a potential effect of the intervention. In addition, there is ample attention for ensuring the rigor of the research. The presented guidelines are developed and illustrated using an empirical example, in which a constructivist grounded theory approach was applied to evaluate the effect of empathy prompts on the motivation to adhere to COVID-19 regulations.
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language English
publishDate 2025-01-01
publisher Public Library of Science (PLoS)
record_format Article
series PLoS ONE
spelling doaj-art-d5f7a3775802447cbd44037263eb77ec2025-08-20T02:10:06ZengPublic Library of Science (PLoS)PLoS ONE1932-62032025-01-01206e032493610.1371/journal.pone.0324936Applying qualitative methods to experimental designs: A tutorial for the behavioral sciences.Hidde Jelmer LeplaaJari A TönjesMariska BouterseKarlijn F B SoppeIrene KlugkistStudies with experimental designs are almost invariably evaluated with quantitative outcomes and methods, both in behavioral sciences and other disciplines. We argue that there can be added value of using qualitative methods for the evaluation of (behavioral) experiments. Incorporating qualitative data can enhance the ecological validity of a study, by acquiring a more holistic understanding of the phenomenon of interest. There is, however, little methodological guidance on how to implement such an approach. In this paper we present the different steps and considerations for a qualitative evaluation of results in experimental designs. Methodological guidelines are offered for each stage of a study, from formulation of the research goals, through data collection and data analysis, to the interpretation of a potential effect of the intervention. In addition, there is ample attention for ensuring the rigor of the research. The presented guidelines are developed and illustrated using an empirical example, in which a constructivist grounded theory approach was applied to evaluate the effect of empathy prompts on the motivation to adhere to COVID-19 regulations.https://doi.org/10.1371/journal.pone.0324936
spellingShingle Hidde Jelmer Leplaa
Jari A Tönjes
Mariska Bouterse
Karlijn F B Soppe
Irene Klugkist
Applying qualitative methods to experimental designs: A tutorial for the behavioral sciences.
PLoS ONE
title Applying qualitative methods to experimental designs: A tutorial for the behavioral sciences.
title_full Applying qualitative methods to experimental designs: A tutorial for the behavioral sciences.
title_fullStr Applying qualitative methods to experimental designs: A tutorial for the behavioral sciences.
title_full_unstemmed Applying qualitative methods to experimental designs: A tutorial for the behavioral sciences.
title_short Applying qualitative methods to experimental designs: A tutorial for the behavioral sciences.
title_sort applying qualitative methods to experimental designs a tutorial for the behavioral sciences
url https://doi.org/10.1371/journal.pone.0324936
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