Delta 9-tetrahydrocannibinol: acute efects on defensive and primary-process language

This study examined the effects of delta 9-tetrahydrocannibinol (THC) on defensive, primary-process, and secondary-process language. Four male volunteers provided 5-minute monologues in three conditions: Round 1,placebo; Round 2, 15 mg THC; Round 3, recovery. THC was found to attenuate defensive language behavior (retractors, qualifiers, direct references) and to increase the use of secondary-process (intellectualizing) vocabulary.