Table 1.
Predictor | X 2a | df b | p c |
---|---|---|---|
Clarity | 140.30 | 6 | <.001 |
Rate | 65.56 | 6 | <.001 |
Clarity × rate | 23.74 | 4 | <.001 |
Shipley vocabulary | 5.53 | 1 | .019 |
Notes.
X2 value for comparisons of each step of the model.
Degrees of freedom for the X2 test.
Value of p reflects the significance of the change in model fit at each step of the model.
Significant values of p are indicated in bold.