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

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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
JournalJournal of Intellectual and Developmental Disability
Publication statusE-pub ahead of print - 16-Oct-2022


  • Attitude
  • direct support professionals
  • intellectual disability
  • nutrition
  • questionnaire

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