noun
abnormal psychology
Academic term for the study of unusual patterns of behavior, emotion, and thought. In modern contexts, often replaced by terms like 異常心理学 (いじょうしんりがく), but 変態心理学 is still encountered in older or specific literature.
彼は大学で変態心理学を専攻している。
He is majoring in abnormal psychology at university.
More common modern term for abnormal psychology. 変態心理学 is an older or alternative name, sometimes with a slightly broader or more clinical nuance.
Compound of 変態 (へんたい, 'abnormal' or 'transformation') and 心理学 (しんりがく, 'psychology'). The term is a direct calque from English 'abnormal psychology'.