An example a negative reinforcement is putting coins in a broken soft drink machine. giving bonuses to workers even when they fail to excel. nagging a spouse to stop smoking. spanking a child to make him or her stop using expletives.

Nagging a spouse to stop smoking.

Explanation:

Negative reinforcement refers to a situation in which a particular behaviour is strengthened by removing a negative outcome. This concept is part of the theory of operant conditioning by B. F. Skinner. In this example, the person would stop smoking (desired behaviour) in order to avoid the nagging of a spouse (negative outcome). Therefore, this is an example of a negative reinforcement.

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.