A questionnaire to measure direct support professionals’ attitude towards healthy nutrition of people with intellectual disabilities

A. Overwijk*, W. P. Krijnen, T. I.M. Hilgenkamp, C. P. van der Schans, A. A.J. van der Putten, A. Waninge

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

41 Downloads (Pure)


Background: Direct support professionals’ (DSPs') attitudes toward nutrition are important for supporting a healthy lifestyle of persons with intellectual disabilities. However, there are no instruments to measure it. The aim of this study was to compose a questionnaire and determine its internal validity. Method: The previously validated Health Enhancing Physical Activity questionnaire was adapted into the Attitude of DSPs for Health Enhancing Nutrition (ADSP-HENU) and completed by 31 DSPs. The internal validity of the questionnaire was investigated by Cronbach’s Alpha and an exploratory non-parametric item response analysis (NIRT). Results: The internal consistency by Cronbach’s Alpha was good (0.87, 95% CI [0.81–0.94]). NIRT showed monotonicity with wide confidence bounds and sufficient point polyserial correlations of the items. This indicates that each attributes to the overall measured attitude. Conclusion: The internal validity of the ADSP-HENU is promising, and it can be used in daily practice for evaluation or adapting interventions to DSPs’ needs.

Original languageEnglish
Pages (from-to)138-145
Number of pages8
JournalJournal of Intellectual and Developmental Disability
Issue number2
Early online date16 Oct 2022
Publication statusPublished - 2023

Bibliographical note

Funding Information:
This work was supported by the Dutch organisation for health research and development, ZonMw, in the program “Gewoon Bijzonder, Nationaal Programma Gehandicapten” [grant number 80-84500-98-118]; “Innovatie Werkplaats Active Ageing van mensen met VB”, a collaboration between the Hanze University of Applied Sciences, Alfa-college, and care provider organisations for people with intellectual disabilities; no grant number is applicable. The authors would like to acknowledge Rianne Steenbergen for her support in the adaptation of the ADSP-HEPA to the ADSP-HENU and for providing feedback for the manuscript. In addition, we would like to thank the direct support professionals for participating in this study.

Publisher Copyright:
© 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.


Dive into the research topics of 'A questionnaire to measure direct support professionals’ attitude towards healthy nutrition of people with intellectual disabilities'. Together they form a unique fingerprint.

Cite this