Tenth Century
- ca. 900 – The concept of mental health (mental hygiene) was introduced by Ahmed ibn Sahl al-Balkhi. He also recognized that illnesses can have both psychological and/or physiological causes.
- ca. 900 – al-Razi (Rhazes) recognized the concept of "psychotherapy" and referred to it as al-‘ilaj al-nafs.
Read more about this topic: Timeline Of Psychology
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