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What is the message of the song to the listener?

So your song might have a strong message, in which you hope you change the way others think on an issue, or it might simply be a tribute to someone you love. But in any case, all songs need to resonate with the listener.

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.