your friend has trouble making commitments in relationships. you believe that this is because her parents had a bitter divorce when she was young. your belief that a child who lives through a bitter parental divorce will have trouble making commitments in relationships as an adult would be considered a(n) .

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.