Table A1.

Results from the regression analysis predicting number of items correct at the long-term test.

Predictor	Estimate	X	Estimate × X
Intercept	4.75	1	4.75
Delaya	−0.50	0.5	−0.25
Weekb	−1.50	0.5	−0.75
Age groupc	0.125	1	0.125
PPVT groupd	−1.125	0.5	−0.563
Delay × Week	0.375	0.5 × 0.5 = 0.25	0.094
Delay × Age	0.125	0.5 × 1 = 0.5	0.063
Week × Age	0.375	0.5 × 1 = 0.5	0.188
Delay × PPVT	0.50	0.5 × 0.5 = 0.25	0.125
Week × PPVT	0.375	0.5 × 0.5 = 0.25	0.094
Age × PPVT	1.50	1 × 0.5 = 0.5	0.75
Delay × Week × Age	−1.00	0.5 × 0.5 × 1 = 0.25	−0.25
Delay × Week × PPVT	0	0.5 × 0.5 × 0.5 = 0.125	0
Delay × Age × PPVT	0.25	0.5 × 1 × 0.5 = 0.25	0.063
Week × Age × PPVT	−0.875	0.5 × 1 × 0.5 = 0.25	−0.219
Delay × Week × Age × PPVT	0.50	0.5 × 0.5 × 1 × 0.5 = 0.125	0.063
		Sum	4.281

Note. PPVT = Peabody Picture Vocabulary Test.