Table 1.

Full items and standardized item loadings from the one-component principal component analysis.

Item #	Item	Loading
01	Not able to do your homework or study for a test	0.61
02	Got into fights, acted bad or did mean things	0.53
03	Missed out on other things because you spent too much money on marijuana	0.66
04	Went to work or school high	0.40
05	Caused shame or embarrassment to someone	0.55
06	Neglected your responsibilities	0.66
07	Relatives avoided you	0.40
08	Felt that you needed MORE marijuana than you used to in order to get the same effect	0.59
09	Tried to control your marijuana use by trying to smoke only at certain times of the day or certain places	0.18
10	Had withdrawal symptoms, that is felt sick (irritated or anxious) because you stopped or cut down using marijuana	0.64
11	Noticed an ongoing or unpleasant change in your personality	0.67
12	Felt that you had a problem with marijuana	0.71
13	Missed a day (or part of a day) of school or work	0.53
14	Tried to cut down or quit smoking marijuana	0.49
15	Suddenly found yourself in a place you could not remember getting to	0.52
16	Passed out or fainted suddenly	0.38
17	Had a fight, argument, or bad feelings with a friend	0.60
18	Had a fight, argument, or bad feelings with a family member	0.53
19	Kept smoking marijuana when you promised yourself not to	0.62
20	Felt you were going crazy	0.60
21	Had a bad time	0.52
22	Felt physically or psychologically dependent on marijuana	0.71
23	Was told by a friend or neighbor to cut down on smoking marijuana	0.59