From: Chinese version of the international positive and negative affect schedule short form: factor structure and measurement invariance
Variables
4111
Age (years)
14.24 ± 1.50
Gender
Male
2002 (48.7%)
Female
2104 (51.2%)
Missing
5 (0.1%)
Grade
7th
866 (21.1%)
8th
1034 (25.2%)
9th
1204 (29.2%)
10th
587 (14.3%)
11th
420 (10.2%)