Explain why someone who is labeled as having a difficult temperament would have a difficulty forming relationships

If someone has a difficult temperament, that could mean they have anger issues or they're extremely isolated, it's not really clear. However, what is clear is that trying to relate to people who have extreme emotions is very difficult.  They might burst out at you, or not respond to you, and because of this, it can be very difficult to have a conversation. If conversing with them is hard, then building a relationship is even harder. Hope this helped, good luck!

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.