The controversy that surrounded psychology after a massive replication attempt indicated that less than half of all psychology studies were replicable is often referred to by scientific journalists as the replication

The correct word that fills the blank is:

- The controversy that surrounded psychology after a massive replication attempt indicated that less than half of all psychology studies were replicable is often referred to by scientific journalists as the replication crisis.

Explanation:

in 2015, the magazine Science published a study where more than 270 investigators and scientist tried replicating 100 relevant scientific articles in the psychology area, the results show that less than 39% of the studies could be replicated, this case was named by the journalists "the replication crisis" and show the variability of the psychologist studies.

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.