Table 7. Mean Changes in Knowledge, Attitude, and Behavior Between Elementary and Middle School Groups

Division		N	Mean Change(△)	SD	t	p
Knowledge Change	Elemetary School	530	+0.26	0.63	−1.144	.253
	Middle School	365	+0.32	0.76
Attitude Change	Elemetary School	530	+0.09	0.61	−2.195	.029*
	Middle School	365	+0.20	0.78
Behavior Change	Elemetary School	530	+0.61	0.75	−0.101	.919
	Middle School	365	+0.61	0.86

p<.05