Construct validity
According to the principle of the varimax rotation, EFA was used to assess the validity of the Chinese version of the PaArticular Scales. The original English version of the PaArticular Scales has good criterion validity and internal consistency reliability.12 EFA is used to find the essential structure of multivariate observations. The factors are first selected based on a screening index of the eigenvalue > 1.0.29 Based on a screen plot, clinical experience and original factor structure of the Scales, the factors are selected again.30-33 Finally, the items are selected as long as the minimum variance in each factor is 5%.