Our previous research has demonstrated that the statistical relationships between personality and drug history are not particularly impressive, but that background, drug history and expectancy are related to specific aspects of the marihuana intoxication experience. The present research explored the relationships between individual difference variables (personality, background, and drug history) and subjective level of intoxication on coltsfoot, placebo, and marihuana in 24 male volunteers. Pearson product-moment correlations were strongest on coltsfoot and placebo. Pro-social dimensions of personality and experience with LSD were most strongly related to subjective level of intoxication.
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