Included infit and outfit mean square (MnSq) for each item, item and person separation reliability, item and person separation index, and also a differential item functioning (DIF) to test the measurement invariance across gender and age. This was conducted using WINSTEPS 3.75.0.

Smith College

- Descriptive statistics
- classical test theory (CTT)
- Rasch analysis

Data Analysis on psychometric properties

Ahorsu, D.K., Lin, C., Imani, V. et al. The Fear of COVID-19 Scale: Development and Initial Validation. Int J Ment Health Addiction (2020). https://doi.org/10.1007/s11469-020-00270-8

The Fear of COVID-19 Scale: Development and Initial Validation

Included internal consistency, test-retest reliability, corrected item-total correlation, average variance extracted (AVE), composite reliability, standard error of measurement, concurrent validity, and exploratory factor analysis (EFA). It was conducted using IBM SPSS 23.0.

Classical Test Theory (CTT)

Rasch analysis

Descriptive statistics are a set of quantitative techniques used to summarize, organize, and visually display the data collected from a research sample. Important examples include measures of central tendency (such as the mean, median, and mode), which describe average scores, and measures of dispersion (such as the range, standard deviation, and variance), which indicate how spread apart the scores are.

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