LSD, psilocybin, and MDMA are all ________

In Maslow's hierarchy of needs, which is the lowest need?

a. Self-esteem b. Self-fulfillment c. Social interaction d. Physiological needs

If the measurement device changes during the course of a within-subjects study so that the participants' scores are influenced, internal validity is threatened by statistical regression

a. True b. False Indicate whether the statement is true or false