Table 4. Factor structure of the 19-item Effort–Reward Imbalance questionnaire using principal axis extraction and varimax rotation.

Scales	Items	F1	F2	F3	F4
Effort	lot of school work		0.62
	have to learn too much		0.71
	schoolwork tiring		0.65
	pressure of competition for exams		0.47
	parents’ high expectations		0.42
Reward	slow in finishing schoolwork			0.59
	do very well at classwork			0.51
	trouble figuring out the answers			0.60
	not recognized by teachers	0.58
	less positive feedback from teachers	0.60
	satisfied with teachers’ appraisal	0.50
	help from teachers	0.58
	unfair treatment from teachers	0.62
	schoolmates kind and helpful	0.46
	unfair treatment from schoolmates	0.49
	not resulting in a good future	0.39
Overcommitment	think about studying				0.54
	studying still on mind				0.65
	trouble sleeping at night				0.50
Variance explained (%)		13.09	10.78	6.54	5.99

Only items with factor loading >0.30 are shown.