. Author manuscript; available in PMC: 2012 Jun 25.

Published in final edited form as: Dev Psychol. 2007 Jul;43(4):1019–1031. doi: 10.1037/0012-1649.43.4.1019

Table 5.

Summary of Regression Analyses Examining Whether Initial (Time 1) Co-Rumination Predicts Later (Time 2) Positive Friendship Quality

	DV = Time 2 Positive Friendship Quality (n = 420)				DV = Time 2 Positive Friendship Quality (n = 298)

	β	t value	R²	R² change	β	t value	R²	R² change
Step 1:
Time 1 Positive Friendship Quality	.40	8.95^****	.1610	—	.50	9.91^****	.2491	—
Step 2:
Gender	−.23	.5.14^****	.2251	.0641^****	−.18	3.53^***	.2864	.0373^***
Grade Group	−.13	3.08^**			−.11	2.20^*
Step 3:
Time 1 Co-Rumination	.09	1.99^*	.2324	.0073^*	.11	2.08^*	.2968	.0104^*
Step 4:
Gender X Grade Group	−.12	1.63	.2421	.0097	−.07	.84	.3100	.0132
Gender X T1 Co-Rumination	−.04	.63			.06	.77
Grade Group X T1 Co-Rumination	.04	.68			.10	1.46
Step 5:
Gender X Grade Group	−.09	1.09	.2443	.0022	−.13	1.42	.3148	.0048
X T1 Co-Rumination

Note.

p < .05.

^**

p < .01.

^***

p < .001.

^****

p < .0001. The total R² value from each of the models tested was significant.