Someone who has a personality disorder that is characterized by a pervasive pattern of disregarding and violating the rights of others has, by definition, a(n) personality disorder.

Antisocial

Explanation: The Antisocial Personality Disorder is a type of personality disorder that causes the person to be impulsive, agressive, respecteless, deceitful, reckless, irresponsable, remorseless. People who suffers from this go against social laws and codes, not wanting to be a part from society and disrupting it.

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.

i would say b. research typically uses a variety of sources