Which of the following factors has the least influence on the effect that a psychoactive drug has on an individual?

Question

Quizplus · Accepted Answer

While all of these factors can influence the effect of a psychoactive drug to some extent, research suggests that an individual's intelligence has the least significant impact. Factors such as expectations, setting, mood, and personality can all significantly impact an individual's response to a drug. However, intelligence does not have a direct relationship with how a drug affects the brain and body.

Which of the Following Factors Has the Least Influence on the Effect