Her parents notice that she just does not seem interested in things, does not have any friends, hardly ever seems really happy, and always seems tired. Betty most likely suffers from .

Betty might suffer from depression, or anxiety. She go get evaluated by a doctor because it could be something more viral or just something that is causing her to be like this

depression

Explanation: Sometimes I felt as if I had depression I was overweight, sad, and I didn't have the best people in my life. It was tough and every mean comment it hurts. I would cry and I would think about if I was gone it would be the best for the people in my life.

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.