According to the pioneering text Alhazen's Book of Optics, the first known psychological experiments may date back as early as 1021; however, many of the most prominent breakthroughs in psychology have happened, only recently, in the last 150 years or so.

In order to gain a proper understanding of how psychology got to where it is today it is important to know a little about the roots of the academic discipline and the people that devoted their lives to helping humankind gain a better understanding of how the mind works.

The following is a timeline of historically significant contributions made to psychology by some of the most influential people in the field:

• Case Psychological Study

  Case study in psychology refers to the use of a descriptive research approach to obtain an in-depth

• Busted Psycho Girl

• Rhode Island Guardian Law Antipsychotic

• Clinical Child Psychology Programs

• Fair Idea Project Psychology Science