. Author manuscript; available in PMC: 2013 Oct 30.

Published in final edited form as: J Neurol Neurosurg Psychiatry. 2012 Mar 26;83(6):10.1136/jnnp-2011-301732. doi: 10.1136/jnnp-2011-301732

Table 4.

Adjusted R² from ANCOVA testing for group differences in factor scores and performances on individual tests comprising each factor

Factor/test	Adjusted R²	Factor/Test	Adjusted R²
Factor 1: speed–inhibition	0.114^**	Factor 4: attention–integration	0.146^**
Stroop: colour	0.095^**	Trail Making Test: part A	0.074^**
Stroop: word	0.081^**	Trail Making Test: part B	0.099^**
Stroop: interference	0.113^**	SDMT	0.148^**
Factor 2: working memory	0.063^**	Factor 5: sensory–perceptual	0.188^**
Letter–number sequencing	0.035^**	Paced timing	0.132^**
2-back working memory	0.049^**	Emotion recognition	0.121^**
Dual verbal working memory	0.039^**	UPSIT	0.064^**
Phonemic verbal fluency	0.030^**
Factor 3: motor planning and speed	0.174^**	Factor 6: verbal learning and memory	0.055^**
Two choice reaction time	0.097^**	HVLT-R: immediate recall	0.091^**
Cued movement sequencing	0.090^**	HVLT-R: delayed recall	0.010^*
Maximum tapping speed	0.126^**
Paced timing	0.134^**

The ANCOVAs adjusted for age. The main effect of group was significant for all factors and the measures comprising each factor at *p<0.006 or **p<0.0001.

HVLT-R, Hopkins Verbal Learning Test-revised; SDMT, Symbol Digit Modalities Test; UPSIT, University of Pennsylvania Smell Identification Task.