Study Bachman et al. (1978): study US 1966

Public

Public highschool boys followed 8 years from grade 10, USA, 1966-74

Sample

Respondents

N = 1628

Non Response

2.8% at T1, 17.2% at T2, 21.0% at T3, 28.9% at T4, 28.5% at T5

Assessment

Multiple assesment methods
Interviews, tests and questionnaires

Correlate

Authors's Label

Drug use

Our Classification

Operationalization

A mean of three items asking how often during the past year respondent had used amphetamines, barbiturates, and LSD for other than medical purposes.
1 = never; 2 = once or twice a year;
3 = 3 to 10 times a year; 4 = once or twice a month; 5 = once or twice a week; 6 = nearly every day. Assessed at T3, T4 and T5

Observed Relation with Happiness