Examining the validity of the drivers of COVID-19 vaccination acceptance scale using Rasch analysis

Abstract

Background: To well control the pandemic of COVID-19, herd immunity should be achieved. However, people, especially those with better physical conditions (e.g., young adults), may not accept COVID-19 vaccines. Understanding university students' willingness or reluctance to uptake COVID-19 vaccination is important.Aim: This study aimed to examine the psychometric properties of the DrVac-COVID19S, an instrument that helps assess motivations/drivers of COVID-19 vaccination uptake among university students.Research design and methods: Using convenience sampling and cross-sectional design, university students (930 from Taiwan [38.0% males] and 1,244 from Ghana [63.3% males]) completed the DrVac-COVID19S using an online survey (Taiwanese students) or paper-and-pen method (Ghanaian students). Rasch analysis was used to examine the psychometric properties of the DrVac-COVID19S.Results: All 12 items in the DrVac-COVID19S had a satisfactory fit in the Rasch models (infit MnSq=0.74 to 1.49; outfit MnSq=0.72 to 1.42). Moreover, the seven-point Likert scale used in the DrVac-COVID19S demonstrated monotonically increasing in their difficulties, which indicated the ordered category. Additionally, no differential item functioning was displayed in the DrVacCOVID-19S across Taiwanese and Ghanaian students. Conclusions:The DrVacCOVID-19S has good psychometric features to help healthcare providers assess individuals' (especially university students) motivations or drivers to get the COVID-19 vaccination.

Motors of COVID-19 Vaccination Acceptance Scale (MoVac-COVID19S): Evidence of Measurement Invariance Across Five Countries

“…Therefore, when future studies want to compare COVID-19 vaccine acceptance across these countries, the nine-item version of the MoVac-COVID19S is recommended. 29 , 30 , 43 …”

“… 42 Fourth, the MoVac-COVID19S is a self-report scale and therefore other confounding factors such as social desirability bias cannot be controlled in the present study. 43 Finally, the sample sizes were different across the five countries (eg, the Afghan subsample had a much smaller sample size). Therefore, the findings in the present study may be less representative among the Afghan subsample.…”

The psychometric properties of motors of COVID-19 vaccination acceptance scale (MoVac-COVID19S): A dataset across five regions

“…The MoVac-COVID19S for Ghanaians was written in English, the official language of Ghanaians. All the recruited participants are natives of their respective countries [10] . All the participants consented to participate by providing a written Informed consent (signing or ticking).…”

Development and psychometric evaluation of the Physical Resilience Instrument for Older Adults (PRIFOR)

“…More specifically, two types of mean square (MnSq), infit MnSq and outfit MnSq, were applied to examine whether an item fits in its embedded construct. Acceptable infit and outfit MnSq are within the range between 0.5 and 1.5 [ 28 ]. If an item has misfit MnSq (either in infit or outfit MnSq), the item is removed and the EFA and Rasch analysis are reanalyzed until satisfactory Rasch fit statistics are achieved.…”