Samuel is at his desk working on a report when he becomes aware of an argument down the hall. He forgets the report and tries to determine who is in the argument. When he first perceived the argument, he was

he forgot the report and tries to determine who is in the argument.

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.