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Published Online:https://doi.org/10.1176/ajp.102.6.825

1. There is no positive relationship between aggressive crime and marihuana usage in the Naval service (Tables I and IV).

2. Similarly, there is no significant causal relationship between aggressive crime in civilian life (of the naval offenders studied) and the use of marihuana (Tables II and V).

3. Marihuana usage is but an aspect of some type of mental disorder or personality abnormality (Table III).

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