This is not an experiment, no variables are being manipulated to specifically understand if any correlation, differencing is simply attempting to lessen the impacts of another variable to try and isolate marijuana's effect on crime, however, if an experiment were to take place and the opposite result was found then the findings of this study would be voided

Problematic Components of this Study

- Aggression
- Achievement
- Family Factors
- Adolescent Smoking
- Non-drug delinquent behavior
- Race

Ohio State University, Columbus

- These children were from the same area which had some variation in wealth but was mostly, impoverished, overcrowded, unemployed and high rates of welfare participation in turn for the most part most indviduals were similar, in terms of lived experiences 

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