A researcher seeks to understand the reasons that a person uses drugs. Which approach is the researcher most likely to adopt?.

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.

a photo collage of women at work during world war 2

answer; negative punishment;