The two biggest causes of college failure are and a. lack of preparation and lack of money; b. family crisis and financial difficulty; c. lack of skills in college success and lack of motivation; d. loss of self-confidence and not attending sufficient classes; e. too much socializing and not enough studying. the subject for this class isn't listed

The correct options are (A) lack of preparation and money, (D) loss of self-confidence and not attending sufficient classes.

The main way to fail class is by avoiding it, leading to a poor performance on tests.  The lack of preparation when it comes to being organized with your deadlines and assignments is crucial in order to keep track of the multiple classes.

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.