Table 13.

Testing Homogeneity of Regression Slopes; Writing Performance

Source	Type III Sum of Squares	df	Mean Square	F	Sig	Partial Eta Squared
Group	0.022	1	0.022	0.085	0.773	0.002
Pretest	5.736	1	5.736	22.064	0.000	0.380
Group * Pretest	0.156	1	0.156	0.601	0.443	0.016
Error	9.359	36	0.260
Total	2058.250	40