John M. Oldham

John M. Oldham is a renowned psychiatrist and expert in personality disorders.

He has authored numerous books and articles on personality and mental health.

John M. Oldham is known for his work in developing the dimensional model of personality, which forms the basis for The New Personality Self-Portrait.

He has held leadership positions in prestigious psychiatric institutions and contributed significantly to the field of personality research.

Oldham's approach combines clinical expertise with accessible writing, making complex psychological concepts understandable to a general audience.

His work has influenced both professional and popular understanding of personality and its disorders.