Psycho Surgery involves brain surgery which is used in the treatment of  severe psychotic patients who have resisted all other forms of treatments   Merits of Biological Approach • Although psychological causes are significant, biological causes are worthy of examination and study too • Research work is rapid, producing valuable new information   Demerits of Biological Approach • Explains human behavior in biological terms, treats with the help of biological methods, and ignores psychological factors • Mental life is an inter play of both biological and non-biological ...