Challenges and solutions for N-of-1 design studies in health psychology

Dominika Kwaśnicka , Jennifer Inauen , Wim Nieuwenboom , Johanna Nurmi , Annegret Schneider , Camille E. Short , Tessa Dekkers , A. Jess Williams , Walter Bierbauer , Ari Haukkala , Federica Picariello , Felix Naughton


Theories of behaviour change and health behaviour change interventions are most often evaluated in between-person designs. However, behaviour change theories apply to individuals not groups and behavioural interventions ultimately aim to achieve within-person rather than between-group change. Within-person methodology, such as N-of-1 (also known as single case design), can circumvent this issue, though has multiple design-specific challenges. This paper provides a conceptual review of the challenges and potential solutions for undertaking N-of-1 studies in health psychology. Key challenges identified include participant adherence to within-person protocols, carry-over and slow onset effects, suitability of behaviour change techniques for evaluation in N-of-1 experimental studies, optimal allocation sequencing and blinding, calculating power/sample size, and choosing the most suitable analysis approach. Key solutions include involving users in study design, employing recent technologies for unobtrusive data collection and problem solving by design. Withinperson designs share common methodological requirements with conventional between-person designs but require specific methodological considerations. N-of-1 evaluation designs are appropriate for many though not all types of interventions. A greater understanding of patterns of behaviours and factors influencing behaviour change at the within-person level is required to progress health psychology into a precision science.
Author Dominika Kwaśnicka (Filia we Wrocławiu / II Wydział Psychologii we Wrocławiu)
Dominika Kwaśnicka,,
- II Wydział Psychologii we Wrocławiu
, Jennifer Inauen
Jennifer Inauen,,
, Wim Nieuwenboom
Wim Nieuwenboom,,
, Johanna Nurmi
Johanna Nurmi,,
, Annegret Schneider
Annegret Schneider,,
, Camille E. Short
Camille E. Short,,
, Tessa Dekkers
Tessa Dekkers,,
, A. Jess Williams
A. Jess Williams,,
, Walter Bierbauer
Walter Bierbauer,,
, Ari Haukkala
Ari Haukkala,,
et al.`
Journal seriesHealth Psychology Review, ISSN 1743-7199, (N/A 140 pkt)
Issue year2019
Publication size in sheets0.75
Keywords in EnglishN-of-1; single case study; within-person design; idiographic design
ASJC Classification2738 Psychiatry and Mental health; 3203 Clinical Psychology
Languageen angielski
Challenges and solutions_tekst.pdf 2.48 MB
Additional file
Oswiadczenie_challenges.pdf 121.51 KB
Score (nominal)140
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 2.803; WoS Impact Factor: 2017 = 8.597 (2) - 2017=8.699 (5)
Citation count*17 (2021-02-23)
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