Eleventh Century
- 1021 – Ibn al-Haytham (Alhazen) began to carry out experiments in areas related to body and the nafs. In his Book of Optics, for example, he examined visual perception and what we now call sensation, including variations in sensitivity, sensation of touch, perception of colors, perception of darkness, the psychological explanation of the moon illusion, and binocular vision.
- 1025 – In The Canon of Medicine, Avicenna described a number of conditions, including hallucination, insomnia, mania, nightmare, melancholia, dementia, epilepsy, paralysis, stroke, vertigo and tremor.
- ca. 1030 – Al-Biruni employed an experimental method in examining the concept of reaction time.
Read more about this topic: Timeline Of Psychology
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