Dimensions of marihuana experience

Area of Science:

• Psychology
• Neuroscience
• Pharmacology

Background:

• Marihuana use is widespread, yet its effects are complex and vary significantly among individuals.
• Understanding user expectations is crucial for interpreting research on marihuana's effects.

Purpose of the Study:

• To investigate the multidimensional nature of marihuana expectations.
• To develop a tool for assessing individual marihuana expectations.
• To explore how expectations influence reported marihuana experiences.

Main Methods:

• A questionnaire was administered to 182 individuals with a history of social marihuana use.
• Factor analysis was used to identify distinct dimensions of marihuana expectations.
• Reported experiences were correlated with frequency of use and identified expectation factors.

Main Results:

• Five key factors of marihuana expectations were identified: functional interference, euphoria, psychological distress, perceptual alteration, and psychotomimetic effects.
• More frequent users reported greater experiences, including some negative effects.
• Individual response profiles to marihuana varied significantly.

Conclusions:

• Marihuana's effects are multidimensional and influenced by individual expectations.
• The developed questionnaire can predict individual expectations, aiding in controlling for 'set' in experimental studies.
• Further research should consider the nature and magnitude of expected effects to understand marihuana's impact.