Table 2.

Mean, standard error, and t-values for cognitive and psychomotor tests.

	Young group (n = 15)		Healthy older group (n = 17)
Test	M	SE	M	SE	t(30)
Digits Span forward	8.40	0.49	6.81	0.41	2.51*
Digits Span backward	7.07	0.42	5.63	0.46	2.32*
Digits Span total	15.47	0.82	12.53	0.61	2.92**
Stroop Word	69.13	4.67	63.24	3.89	ns
Stroop Color	52.00	1.12	47.47	2.05	ns
Stroop Word/Color	33.33	1.47	26.82	1.49	3.08**
Purdue Pegboard
Right hand	16.07	0.38	13.59	0.52	3.74***
Left hand	15.07	0.43	12.31	0.43	4.55***
Both hands	12.53	0.43	9.94	0.30	4.99***
Assembly	36.67	1.51	23.12	0.97	7.74***
Finger tapping R	238.27	9.02	208.65	8.98	2.32*
Finger tapping L	217.93	9.04	192.18	10.97	ns
Logical Memory I	16.60	0.97	15.94	0.85	ns
Logical Memory II	15.33	0.84	14.29	0.79	ns

*p < 0.05, **p < 0.01, ***p < 0.001. ns, non-significant.