Table 1.

Three factor solution from exploratory factor analysis

Proposed Grouping	Indicator/Measure	Factor 1	Factor 2	Factor 3
Executive function	ADHD	0.166	0.443	0.193
Executive function	Attentional Impulsivity	0.259	0.675	−0.024
Executive function	Motor Impulsivity	0.068	0.662	−0.042
Executive function	Non-planning Impulsivity	0.093	0.73	0.074
Executive function	Delay Discounting (K)	0.174	−0.184	0.027
Executive function	Conscientiousness	0.036	−0.723	−0.014
Executive function	Negative Urgency	0.329	0.536	0.143
Executive function	Premeditation	−0.008	1.022	−0.31
Executive function	Perseverance	0.157	0.64	−0.002
Executive function	Positive Urgency	0.374	0.504	0.042
Negative Emotionality	Depression	0.151	−0.081	0.689
Negative Emotionality	Neuroticism	0.534	0.007	0.294
Negative Emotionality	Extraversion	−0.394	0.307	0.008
Negative Emotionality	Openness	−0.039	0.009	−0.117
Negative Emotionality	Agreeableness	−0.598	−0.042	0.174
Negative Emotionality	Trait Anxiety	0.35	0.112	0.524
Negative Emotionality	Aggression	0.931	−0.053	−0.001
Negative Emotionality	OCDS Item 11	0.005	−0.062	0.976
Incentive Salience	OCDS Item 1	−0.123	0.032	0.903
Incentive Salience	OCDS Item 13	0.003	−0.191	0.997
Incentive Salience	ADS Item 18	−0.119	0.017	0.986

Note: Boldface indicates factor loadings ≥ 0.350. We note that the loading for Premeditation in Factor 2 is larger than 1, however, in applying the oblique GEOMIN rotation, which allows for correlation between factors, the factor loadings are expressed as regression coefficients and not correlations. Thus factor loadings larger than 1 are possible.