TABLE 5.

Average number of different lexical items across age group.

	Age group 1		Age group 2		Age group 3
	Mean	S.D.	Mean	S.D.	Mean	S.D.
Noun∧	28.28	10.86	47.5	12.67	47.77	15.57
Verb∧	21.78	7.12	34.05	9.86	32.36	9.51
Adjective∧	8.06	3.32	17.19	6.33	17.95	5.71
Closed class words∧	55.5	10.42	69.52	16.02	64.95	18.68

^∧Number of different items in that particular lexical class.