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. 2009 Nov 7;59(2):169–195. doi: 10.1007/s11881-009-0030-0

Table 2.

Means and standard deviations on age and control measures

	Experimental group, n = 30		Control group, n = 27
Measures	M	SD	M	SD
Age^a (in month)	69.87	3.22	71.13	4.42
Receptive vocabulary^a	72.23	9.78	70.74	9.87
Non-verbal IQ^b	25.57	4.68	26.93	4.58

^aMeasured at pre-test

^bMeasured halfway first grade