What is a strength of the humanistic approach?

-Maslow's research to support self-actulisation -Eg: Maslow looked at 18 biographies of famous poeple Maslow viewed as being self-actualised eg: Albert Einstien. -Concluded they possessed 15 characteristics of a self-actulised person, like being highly creative and having an unusal sense of humor -However, the categories aren't operationalised and highly subjective with Maslow, research being conduted subjectivey as he assumed these qualities in people