Department of Epidemiology, University of Groningen, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands.
Netherlands Interdisciplinary Demographic Institute, PO Box 11650, 2502 AR The Hague, The Netherlands.
Int J Environ Res Public Health. 2019 Aug 26;16(17):3106. doi: 10.3390/ijerph16173106.
Improvement of volunteering rates in the Netherlands is important because increased productivity among older adults would contribute to societal sustainability in the light of population aging. Therefore, a better understanding of volunteer motivations of Dutch older adults is needed. The Volunteer Functions Inventory (VFI) for assessing volunteer motivations has good psychometric properties and is adapted to several languages, but no validated Dutch translation yet exists. The aim of the current study is to validate the VFI for use in the Dutch older population (60 years and over). The Dutch-translated VFI (6 scales, 30 items) is included in the Lifelines 'Daily Activities and Leisure Activities add-on Study', which was distributed among participants aged 60 to 80. Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA) are performed to assess the validity of the translated VFI. Internal consistency is assessed by computing Cronbach's 's. Results of the EFA ( = 4208) point towards a six-factor solution with a nearly perfectly clean structure. Deletion of three problematic items results in a clean factor structure. CFA results indicate moderate model fit (RMSEA = 0.06, CFI = 0.90, TLI = 0.89). Cronbach's 's (0.78 to 0.85) indicate good internal consistency. Goodness-of-fit indices are sufficient and comparable to those obtained in the validation of the original VFI. The current study provides support for use of the Dutch-translation of the VFI (6 scales, 27 items) to assess volunteer motivations among Dutch volunteers aged 60 years and over.
提高荷兰的志愿服务率很重要，因为老年人的生产力提高将有助于人口老龄化背景下的社会可持续性。因此，需要更好地了解荷兰老年人的志愿服务动机。评估志愿服务动机的《志愿者功能清单》（VFI）具有良好的心理测量学特性，并适用于多种语言，但尚未有经过验证的荷兰语翻译版本。本研究的目的是验证 VFI 在荷兰老年人群体（60 岁及以上）中的适用性。该研究纳入了 Lifelines“日常活动和休闲活动附加研究”的参与者，这些参与者年龄在 60 至 80 岁之间，参与者填写了包含 6 个量表、30 个项目的荷兰语翻译版 VFI。该研究采用探索性因素分析（EFA）和验证性因素分析（CFA）来评估翻译后 VFI 的有效性。通过计算 Cronbach's 's 来评估内部一致性。EFA 的结果（n = 4208）表明存在六因子解，且具有几乎完美的干净结构。删除三个有问题的项目后，因子结构更加干净。CFA 结果表明模型拟合度中等（RMSEA = 0.06，CFI = 0.90，TLI = 0.89）。Cronbach's 's（0.78 至 0.85）表明内部一致性良好。拟合度指标良好，与原始 VFI 的验证结果相当。本研究为使用荷兰语翻译的 VFI（6 个量表，27 个项目）评估荷兰 60 岁及以上志愿者的志愿服务动机提供了支持。
