. Author manuscript; available in PMC: 2014 Sep 1.

Published in final edited form as: Behav Ther. 2014 Jan 30;45(5):640–650. doi: 10.1016/j.beth.2014.01.006

Table 1.

Demographic and Personality Characteristics of the Study Sample

	High BAS (n = 28)	Moderate BAS (n = 21)	t/χ²
Age	18.52 (1.16)	18.57 (1.50)	0.14
Sex	64.3% female	66.7% female	.03
Race	53.6% Caucasian	47.6% Caucasian	1.55
	28.6% African American	26.3% African American
	10.7% Asian/Pacific Islander	9.5% Asian/Pacific Islander
	3.6% Other	4.8% Native American
	3.6% No response/declined to respond	4.8% Other
		9.5% No response/declined to respond
Ethnicity	7.1% Hispanic or Latino	9.5% Hispanic or Latino	.09
BIS	19.36 (4.03)	19.79 (2.88)	0.40
BAS-Total	46.08 (2.54)	38.15 (.99)	13.16^*
BAS-Reward	18.50 (1.20)	16.65 (1.66)	4.48^*
BAS-Drive	13.73 (1.56)	10.60 (1.14)	7.53^*
BAS-Fun Seeking	13.89 (1.52)	10.90 (1.59)	6.60^*
SPSRQ-SR	8.36 (1.28)	4.84 (1.68)	8.14^*
Time to EEG	182.59 (178.94)	210.95 (175.86)	0.55
Left-frontal EEG asymmetry	.02 (.10)	−.02 (.08)	1.31

Note. BIS/BAS = Behavioral Inhibition System/Behavioral Activation System; SPSRQ-SR = Sensitivity to Punishment/Sensitivity to Reward Questionnaire–Sensitivity to Reward subscale; time to EEG = days from Time 1 session until EEG session.

p < .001.