TABLE 4.

Mean lexical diversity differences and standard errors (SE) and comparisons among discourse elicitation task for each group

Comparison	Mean Δ	SE	t(24)a	p
PWA
Single vs Sequential pictures	–14.29	4.22	–3.38	.002*
Single pictures vs Story telling	–11.26	3.91	–2.08	.008*
Sequential pictures vs Story telling	3.03	4.76	.64	.53
NIA
Single vs Sequential pictures	–19.83	5.69	–3.49	.002*
Single pictures vs Story telling	–15.87	5.75	–7.99	.000*
Sequential pictures vs Story telling	–26.05	5.38	–4.84	.000*

To control for Type I Error, alpha was set to .008 for each simple effect.

^aPaired sample t was conducted with 26 df for the NIA group.

^*p < .008.