Table 4.

Summary of t-tests comparing age groups on the parameters that describe how amplitude and steepness change as a function of time.

	DV	Parameter	7–8 vs. 12–13			12–13 vs. 17–18
			t(47)	p		t(47)	p
b/p	Categorization Amplitude	Crossover	6.95	<.001	*	4.54	<.001	*
		Slope	2.46	.018	*	<1
		Asymptote	2.37	.022	*	<1
	Categorization Slope	Crossover	<1			<1
		Slope	1.09	.28		1.63	.11
		Asymptote	2.27	.028	*	<1
ʃ/s	Categorization Amplitude	Crossover	3.30	.002	*	2.28	.027	*
		Slope	2.25	.029	*	2.05	.046	*
		Asymptote	1.80	.077	+	<1
	Categorization Slope	Crossover	<1			<1
		Slope	1.59	.12		<1
		Asymptote	2.29	.026	*	<1