As we observe and grow to understand others, we also begin to better understand ourselves. Self-knowledge expands emotional control and our ability to choose effective strategies when interacting with others. Psychology provides the basis. Human behavior is not random. When observed over time, individual behavior appears fairly consistent.
Science defines patterns that describe and predict behavior as personality type.
All of us tend to identify and feel most comfortable with people who have personalities like ours. Understanding personality can help us to be effective with people whose personalities are different. Interviewers who understand personality and type behavior can communicate with subjects as individuals. Subjects respond by providing providing better information. Better communication, established early in the interview, leads to more significant admissions.