Final answer:
The idiographic perspective, which focuses on individual uniqueness, is used in the humanistic approach to understanding personality.
Step-by-step explanation:
The idiographic perspective in psychology is interested in discovering what makes each of us unique. This perspective is utilized particularly in the humanistic approach to understanding personality. The humanistic perspective emphasizes individuality and stresses the importance of growth and self-actualization. This outlook on personality contrasts with other approaches such as the psychodynamic, biological, and trait perspectives, which may focus on more general principles of personality that apply across individuals. The idiographic approach, on the other hand, seeks to understand the singular characteristics that differentiate one person from another.