Final answer:
The false statement is that personality tests are only used in clinical settings; they are indeed used in various fields, such as organizational psychology.
Step-by-step explanation:
The statement that is FALSE among the given statements about personality testing is: "Personality tests are only used in clinical settings and not in other fields such as organizational psychology." This statement is not accurate because personality assessments are used in a variety of settings beyond clinical ones, including employment screening, law enforcement, and organizational contexts for job training and personnel decisions. The use of these tests is not limited to just clinical diagnoses but plays a significant role in other aspects of professional and social evaluations.