Table 1.

Obtained Minimum, Maximum, Mean and Standard Deviation Scores for Each of the Barratt Impulsiveness Scale and Zimbardo Time Perspective Inventory subscales.

Scale	Subscale	alpha	Min.	Max.	Mean	SD
Barratt Impulsiveness Scale	Total scores for BIS (30 items; 30–120)	.80	1.50	2.97	2.20	.30
	Motor (10 items; 10–40)	.75	1.20	3.30	2.24	.42
	Non planning (12 items; 12–48)	.68	1.08	3.00	2.06	.42
	Attention (8 items; 8–36)	.58	1.50	3.25	2.37	.38
Zimbardo Time Perspective Inventory	Past negative (10 items; 10–50)	.82	1.20	4.50	2.94	.67
	Present hedonistic (15 items; 15–75)	.80	2.33	4.53	3.40	.48
	Future (13 items; 13–65)	.73	2.08	4.46	3.47	.48
	Present fatalistic (9 items; 9–45)	.68	1.22	3.56	2.23	.52
	Past positive (9 items; 9–45)	.73	1.78	4.89	3.74	.53

Note. Number of items and the range of scores for each subscale are shown in parentheses.