I thought Mazlow's hierarchy was a theory, one that should hopefully be tested by experiment somehow. Why is the addiction study not reproducible? I agree that

I thought Mazlow's hierarchy was a theory, one that should hopefully be tested by experiment somehow. Why is the addiction study not reproducible? I agree that you should perhaps take an additional step of having 4 groups: heroin+rat park, placebo heroin+rat park, heroin+rat jail, placebo heroin+rat jail. And blind the researcher making the observations as to the nature of the substance.