# Correlational findings

## Study Bachman et al. (1978): study US 1966 /1

Public
Public highschool boys followed 8 years from grade 10, USA, 1966-74
Sample
Respondents
N = 2213
Non Response
2.8% at T1, 17.2% at T2, 21.0% at T3, 28.9% at T4, 28.5% at T5
Assessment
Interview: face-to-face
Interviews, tests and questionnaires

## Correlate

Authors's Label
Marijuana use
Our Classification
Operationalization
Simple direct question at T3, T4 and T5 asking respondent how often he used marijuana (for other than medical purposes) during part or all of the last year. 1 = never; 2 = once or twice a year; 3 = 3 - 10 times a year;
4 = once or twice a month; 5 = once or twice a week; 6 = nearly every day

## Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks O-HP-g-mq-v-5-a = -               Marijuana use
Happiness     T3        T4        T5
T1      tau = -.06      -.05      -.05
T2      tau = -.06      -.08 (05) -.05
T3      tau = -.01      -.06      -.02
T4      tau = -.02      -.04      -.06
All tau's not significant, unless indicated otherwise
T1:1966, T2:1968, T3:1969, T4:1970, T5:1974