Table 2. Descriptive statistics of the measures extracted from the discourse samples produced by the neuro-typical and aphasia groups.

Discourse	Measure	Neuro-typical group			Aphasia group
		Mean	SD	Range	Mean	SD	Range
Storytelling narrative	-Length (number of tokens)	265.3	140.41	101–706	156.7	114.53	8–454
	-Duration (seconds)	128.58	64.64	43–322	190.2	109.78	42–620
	-CIU	253.85	136.86	99–672	109.2	96.78	0–409
	-NDW	99.90	32.41	55–184	51.37	35.03	0–140
	-Target-checklist*	63.65	32.75	26–165	30.6	21.94	0–85
Picture description	-Length (number of tokens)	107.65	49.14	56–252	66.57	59.70	6–315
	-Duration (seconds)	49.32	26.02	27–118	95.09	66.22	11–310
	-CIU	102.95	47.81	53–243	45.26	41.9	2–211
	-NDW	57.85	18.08	32–117	27.91	19.39	2–90
	-Target-checklist*	27.5	10.49	15 – 55	13.22	11.48	0–60

All measures were significantly different between the two groups across both discourse tasks (p < 0.01).

^*The index measure developed in this study.