. Author manuscript; available in PMC: 2017 Dec 1.

Published in final edited form as: Q J Exp Psychol (Hove). 2016 Dec;69(12):2431–2451. doi: 10.1080/17470218.2015.1121282

Table 1.

Demographic variables and performance on control composite scores as a function of age.

	Young	Old
n	102	60
Age	21.2 (3.08)	71.0 (4.96)	p < .001^*
MMSE	-	28.83 (1.12)	-
Education	14.0 (1.69)	16.0 (2.81)	p < .001^*
WAIS Vocabulary (/66)	52.1 (7.3)	51.8 (7.53)	p = .81
Symbol-digit coding (speed; /35)	24.8 (4.45)	16.3 (3.17)	p < .001^*
Response-distractor inhibition composite	−0.15 (0.50)	0.25 (0.76)	p < .001^*
Resistance to PI composite	−0.32 (0.43)	0.54 (0.70)	p < .001^*
WM composite	0.23 (0.64)	−0.40 (0.82)	p < .001^*

Note. For the digit symbol task and WM composite, higher scores reflect better performance. For the inhibition and resistance to PI composite scores, higher scores reflect worse performance (i.e., larger interference effects).

Significant group differences, p < .05.