Consider other interpretations. These young Jamaican children, members of the Rastafarian church, are smoking
ganga (marijuana), which their religion regards as a “wisdom weed”.
Will they react in the same way as a North American who buys the drug on the streets and smokes it alone or at a party?
Many people attribute the effects of psychoactive drugs solely to properties of the drug itself. An alternative
explanation, however, supported by much evidence, emphasizes the importance
of setting, motives, and cultural expectations.
Taken from a first year university psychology textbook.