. Author manuscript; available in PMC: 2020 Mar 1.

Published in final edited form as: Biol Psychiatry Cogn Neurosci Neuroimaging. 2018 Sep 29;4(3):233–242. doi: 10.1016/j.bpsc.2018.09.007

Table 2.

Factor Loadings of Neuropsychological Measures Using Principle Component Analysis with Varimax Rotation and Group Differences on These Factors.

	Disinhibition	Delay Aversion	Impulsive Choice
Neuropsychological Test
Conners’ CPT-II, Commission Errors	.73	.06	−.01
Stop Signal Reaction Time (RT)	.71	.28	−.12
Delayed Memory Test, Commission Error Percent	.64	−.49	.17
Single Key Impulsivity Paradigm, Average IRT	.12	.80	.08
Experiential Delay Task	.11	.37	.52
Delayed Discounting Questionnaire	−.12	−.10	.86
Group Characteristics	M (SD)	M (SD)	M (SD)
ADHD	−0.16 (0.94)	−0.03 (0.89)	−0.17 (0.82)
Non-ADHD	0.16 (1.04)	0.03 (1.11)	0.17 (1.13)
T-test (df = 133)	1.90	0.31	2.03^*

Factor loadings > .30 are in boldface. Abbreviations: CPT = Continuous Performance Task; RT = Reaction Time; IRT = Inter-Response Time.

p < .05