Not having had sex education (N = 1566)

Having had sex education

(N = 2826)

Total¹

(N = 4392)

M

SD

M

SD

M

SD

F

p

Effect size (d)²

HIV/AIDS knowledge (N = 4186)

Middle school students High school students University students

3.7 5.5 7.7

2.54 2.65 1.18

4.7 6.5 7.8

2.51 1.99 1.02

4.3 6.2 7.8

2.57 2.25 1.09

51.051^*

78.465^*

5.590

.000

.000

.018

.23

.28

.07

Attitudes towards HIV-infected people (N = 4262)

Middle school students High school students University students

11.8 12.9 14.6

2.28 2.31 1.13

12.6 13.6 14.7

2.22 1.93

.97

12.3 13.4 14.6

2.27 2.07 1.03

38.338 40.630 2.445

.000

.000

.118

.20

.20

.05

Attitudes towards condoms (N = 4243)

Middle school students High school students University students

8.0 9.1 10.0

2.65 2.35 2.25

8.4 9.2 10.0

2.46 2.36 2.08

8.2 9.2 10.0

2.55 2.36 2.15

8.793 1.319

.051

.003

.251

.821

.10

.04

.01