Random assignment also removed any personality variables that might have explained the tendencies for divorced kids to lack intimacy. For example, in the quasi study described in Question 1, divorced parents might have argumentative personalities and these personalities were genetically based and parents passed on their tendency to argue to their offspring. The manipulation of marital status in my study is bizarre, rare, and inhumane. In this sense, the external validity is low. Overall, the external validity is low.
Marital couples go to psychologists for help.
Psychologists would never be allowed to harm folks in this way. See me if you still are confused about the terms and their applications.