The Dutch comparative scale for assessing volunteer motivations among volunteers and non-volunteers: An adaptation of the volunteer functions inventory

Jacobien Niebuur, Aart C. Liefbroer, Nardi Steverink, Nynke Smidt

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Currently, no valid scales exist to compare volunteer motivations between volunteers and non-volunteers. We aimed to adapt the Dutch version of the Volunteer Functions Inventory (VFI) in order to make it applicable for the comparison of volunteer motivations between Dutch older volunteers and non-volunteers. The Dutch version of the VFI was included in the Lifelines 'Daily Activities and Leisure Activities add on Study', which was distributed among participants aged 60 to 80. Confirmatory factor analysis (CFA) models were estimated for volunteers and non-volunteers separately, and subsequently a CFA model was created based on all observations irrespective of volunteer status. Finally, group-based CFA models were estimated to assess measurement invariance. The resulting measurement instrument (6 factors, 18 items), containing both a volunteer version and a non-volunteer version, indicated an acceptable model fit for the separate and the combined CFA models (root mean square error of approximation (RMSEA) = 0.06, comparative fit index (CFI) = 0.95). Group-based models demonstrated strong invariance between the samples. The current study provides support for the validity of the Dutch Comparative Scale for Assessing Volunteer Motivations among Volunteers and Non-Volunteers, among Dutch older adults.

Original languageEnglish
Article number5047
Pages (from-to)1-16
Number of pages16
JournalInternational Journal of Environmental Research and Public Health
Volume16
Issue number24
DOIs
Publication statusPublished - 11 Dec 2019

Funding

Acknowledgments: We wish to acknowledge the services of the Lifelines Cohort Study, the contributing research centers delivering data to Lifelines, and all the study participants. The Lifelines Biobank initiative has been made possible by subsidy from the Dutch Ministry of Health, Welfare and Sport, the Dutch Ministry of Economic Affairs, the University Medical Center Groningen (UMCG the Netherlands), University Groningen and the Northern Provinces of the Netherlands. This research was funded by a crowd funding campaign performed by the Ubbo Emmius Fonds Groningen, which transferred the proceeds as a gift to the University of Groningen. Neither the study sponsors (the public) nor the Ubbo Emmius Fonds have been involved in the research process. Author Contributions: Conceptualization, J.N., A.C.L., N.S. (Nardi Steverink) and N.S. (Nynke Smidt); Methodology, J.N., A.C.L., N.S. (Nardi Steverink) and N.S. (Nynke Smidt); Validation J.N., A.C.L., N.S. (Nardi Steverink) and N.S. (Nynke Smidt); Formal Analysis, J.N. and A.C.L.; Writing—Original Draft Preparation, J.N.; Writing—Review & Editing, J.N., A.C.L., N.S. (Nardi Steverink) and N.S. (Nynke Smidt); Visualization, J.N.; Supervision, N.S. (Nynke Smidt); Project Administration, N.S. (Nynke Smidt) Funding: This research was funded by a crowd funding campaign performed by the Ubbo Emmius Fonds Groningen, which transferred the proceeds as a gift to the University of Groningen. Neither the study sponsors (the public) nor the Ubbo Emmius Fonds have been involved in the research process.

FundersFunder number
A.C.L.
N.S.
Nynke
Ubbo Emmius Fonds
Ubbo Emmius Fonds Groningen
Rijksuniversiteit Groningen
Nicolaas Mulerius Foundation, University of Groningen
Ministerie van Volksgezondheid, Welzijn en Sport
Ministry of Economic Affairs
Universitair Medisch Centrum Groningen

    Keywords

    • comparative scale
    • measurement instrument
    • measurement invariance
    • older adults
    • psychometric properties
    • Volunteer Functions Inventory
    • volunteer motivations

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