The idiographic approach is used in this particular situation.
Idiographic psychologists emphasize the individual's unique personal experience of human nature. This means that they prefer qualitative research methods such as case studies, unstructured interviews, and thematic analysis, which provide an in-depth understanding of individual behavior. According to the idiographic approach to personality, each of us has a distinct psychological structure. Certain traits or combinations of traits may be shared by only one person, making it impossible to compare people like for like.
Time series analysis is an example of an idiographic method, which is a type of research method.
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