Final answer:
The research method involving interviewing a person and consulting various sources to reconstruct their past is called the biographical approach.
Step-by-step explanation:
The method of conducting research by interviewing the person and consulting various other sources related to the person's life is known as the biographical approach. This approach involves reconstructing a person's past by interviewing them and consulting various other sources related to their life. Researchers use this method to gain insight into an individual's experiences, background, and development over time. Similar to the case study method used by Sigmund Freud in developing his theory of human personality, a biographical approach focuses on in-depth analysis of a single individual's life. This approach is distinct from longitudinal research, which involves repeated testing of a group of individuals over an extended period of time, and cross-sectional research, which compares different segments of the population at a single point in time.