Answer:
1. the trait of patience in many different situations.
Explanation:
A psychologist can be defined as an expert or professional who specializes in the scientific study of human emotions, mind, mental processes and behavior, as well as how external factors and conditions influence or affect human beings.
Personality can be defined as a combination of behavioral sets, motivation, cognition, thoughts and emotional patterns that arises from biological and other external factors, which typically distinguish a person from another. Thus, personality is simply the individual differences in the thoughts, emotions, feelings and behavioral patterns of human beings.
Basically, psychologists are able to study a patient's personality through the process of understanding his or her characteristic sets of trait, emotion, motivation, thought and behavioral pattern.
Hence, the best example of psychologists studying personality would typically be a researcher studying the trait of patience in many different situations.