Krachtvoer: process evaluation of a Dutch programme for lower vocational schools to promote healthful diet
Open accessAbstract
The aim of this study was to examine the fidelity and completeness of the implementation of a school-based healthful diet promotion programme called 'Krachtvoer' (we use the Dutch title of the programme throughout this article. A possible translation is Power Food, but this does not reflect the play on words in the Dutch title), aimed at lower vocational training students aged 12-14 years. The teachers' and students' opinions of the programme were also assessed, as well as the association between these opinions and the level of implementation. Data were collected through structured teachers' monitoring reports, in-class observations and in-depth interviews with teachers. Further data were drawn from a student questionnaire included in a concurrent cluster-randomized baseline post-test experimental study evaluating the effects of the programme. The present study indicates that the teachers implemented the programme largely according to plan, that the teachers appreciated most parts of the programme and that the students who were exposed to the programme were more appreciative of their nutrition education lessons than students who followed the usual curriculum. However, programme elements that teachers did not like were often not implemented. We conclude that the Krachtvoer programme is a promising tool to encourage students in lower vocational training to adopt diets that are more healthful. The present study revealed the stronger and weaker parts of the programme and can thus guide programme improvement.
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Self-report is the most common means of evaluating the responsiveness of all participants to an intervention.
“Self-report is the most common means of evaluating the responsiveness of all participants to an intervention [30-34,37].”
From A conceptual framework for implementation fidelity (2007) · cites this paper as [34]
The Method (pp. 4–5) describes student questionnaires, teacher monitoring reports and teacher interviews that gathered participants’ views of the programme. It also describes classroom observations and a triangulated evaluation. This supports self-report as one means used in this study, but not the broader claim that it is the most common means of evaluating all participants’ responsiveness to interventions. (LLM, conf=0.84)
Experimental — accuracy not yet measuredKrachtvoer has been systematically developed and adapted over time based on available theoretical and empirical knowledge and results from effect and process evaluation studies of Krachtvoer and has a phased approach.
“Krachtvoer has been systematically developed and adapted over time based on available theoretical and empirical knowledge and results from effect and process evaluation studies of Krachtvoer and has a phased approach [26, 27, 28].”
From Balancing Fidelity and Adaptation: Action‐Oriented Research Towards Implementing a Nutrition Education Program Among Adolescents (2025) · cites this paper as [28]
The intervention section (pp. 2, 4) says Krachtvoer was developed using intervention mapping, theoretical knowledge and preliminary studies, and describes its three phases. The Discussion (p. 9) says the effect and process evaluations can guide future revisions; it does not establish that the programme had already been adapted over time based on those evaluations. (LLM, conf=0.88)
Experimental — accuracy not yet measuredProgram characteristics were identified that facilitated the implementation process, demonstrating the impact of the implementation studies conducted on earlier versions of Krachtvoer.
“In particular, program characteristics were identified that facilitated the implementation process, demonstrating the impact of the implementation studies conducted on earlier versions of Krachtvoer [27, 28].”
From Balancing Fidelity and Adaptation: Action‐Oriented Research Towards Implementing a Nutrition Education Program Among Adolescents (2025) · cites this paper as [28]
The General opinions of the programme section (p. 6) identifies features teachers valued, including its practical approach, free materials and varied activities; the Discussion (p. 8) links students’ preferences to how fully teachers implemented lessons. The intervention section (p. 2) says earlier focus groups informed design choices intended to promote implementation, but the paper does not demonstrate that studies of earlier Krachtvoer versions caused the facilitating characteristics observed here. (LLM, conf=0.82)
Experimental — accuracy not yet measuredIn a study of a school-based health promotion intervention, teachers reported that they did not implement certain components of the intervention if they felt the students were not responding and were not interested.
“In a study of a school-based health promotion intervention, the teachers reported that they did not implement certain components of the intervention if they felt the students were not responding and were not interested [34].”
From A conceptual framework for implementation fidelity (2007) · cites this paper as [34]
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Butscher, F., Ellinger, J., Singer, M., & Mall, C. (2024) · Figshare · doi:10.6084/m9.figshare.26679917
Butscher, F., Ellinger, J., Singer, M., & Mall, C. (2024) · Figshare · doi:10.6084/m9.figshare.26679911
Butscher, F., Ellinger, J., Singer, M., & Mall, C. (2024) · Figshare · doi:10.6084/m9.figshare.26679899
Butscher, F., Ellinger, J., Singer, M., & Mall, C. (2024) · Figshare · doi:10.6084/m9.figshare.26679902
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- Authors
- Martens, M.
- Affiliations
- Maastricht University (NL)
- Corresponding author
- Martens, M.
- Venue
- Health Education Research
- Publisher
- Oxford University Press (OUP)
- Published
- 2006-05-15
- Volume
- 21
- Issue
- 5
- Pages
- 695-704
- ISSN
- 0268-1153 (ISSN-L)
- 1465-3648
- OpenAlex
- W2153888161
- Cited by
- 58
- References
- 18
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 10 · 2023: 3 · 2022: 1 · 2021: 3 · 2020: 1 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 2 · 2015: 4 · 2014: 4 · 2013: 5 · 2012: 4
- FWCI
- 6.02
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Health Education Research (publishedVersion)
- PubMed (publishedVersion)
- Research Publications (Maastricht University) (publishedVersion, other-oa)
- EUR Research Repository (Erasmus University Rotterdam) (submittedVersion)
- TNO Repository (submittedVersion)
- Repository hosted by TU Delft Library (TU Delft) (submittedVersion)
- Data Archiving and Networked Services (DANS) (submittedVersion)
- Research Publications (Maastricht University) (submittedVersion, other-oa)
- Topics
- Health Sciences › Health Professions › Speech and Hearing › School Health and Nursing Education
- Health Sciences › Health Professions › General Health Professions › Health Policy Implementation Science
- Health Sciences › Nursing › Nutrition and Dietetics › Nutrition, Health and Food Behavior
- Keywords
- nutrition education, teacher perceptions, student perceptions, adolescents, school health promotion, program improvement
- MeSH terms
- Adolescent, Child, Curriculum, Faculty, Feeding Behavior, Female, Health Education, Health Promotion, Humans, Male, Netherlands, Schools, Students, Teaching Materials, Program Evaluation
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