On Time Effect of Preschool Education: Social Analysis Based on CUCDS

Table 1

Split half reliability and calibrated reliability of the test.

Test name	Age group (years)	Split half reliability	Calibrated reliability of Spearman–Brown formula
Chinese test	3–6	0.76	0.86
	7-8	0.82	0.90
	9–12	0.78	0.88
	13–15	0.73	0.84
	3–6	0.86	0.92
Mathematics test	7-8	0.88	0.94
	9–12	0.91	0.95
	13–15	0.82	0.90