Psychometric Analysis of the Erxin Scales

The Erxin Scales exhibited a difficulty coefficient of 0.65 and a discrimination indexDiscrimination index of 99%. The overall scale demonstrated a homogeneity reliabilityHomogeneity reliability (internal consistency) of 0.85, with the split-half reliabilitySplit-half reliability and Spearman-Brown coefficients for main test agesMain test ages, as well as test–retest reliability, all reaching or approaching 0.80. Correlation coefficients between the overall scale and criterion scalesCriterion scales ranged from 0.57 to 0.78. Factor analysis revealed factors aligning with the five dimensions of the scale. The goodness of fit between the conceptual model and the actual model was satisfactory, and 93.9% of the correlation coefficients between items and month ages exceeded 0.5. The statistical indicators of the scales met the psychometric requirements.