Answer:
Speculating and tracing different ideas about human behavior and nature is not recent its been here for a long time back to the 5th century BC, when many philosophers like Aristotle, Plato, and many other were grappling the problems that are the issues the psychologist are concern for, in modern days.
One can not say how old this discipline of psychology is but it is evident that begins approximately 200 years ago in and should be considered as the product of both nineteenth and twentieth century thought. It is emerged from the philosophy in back of the nineteenth century.
As the field of study of psychology is something immense, we can start both with research that goes back to the 5th century BC, for example, those of Plato and Aristotle, and with recent research that goes back 200 years ago.
Each one can serve as a starting point for the study of psychology, the oldest with its philosophical concepts and the modern with its tests and scientific studies.
The beginning of modern psychology takes place with the beginning of the 19th century, because previously the way of thinking was different, the studies were based on intuition and with their life experiences.
From the 19th century onwards, it became a less philosophical and more scientific study, not leaving philosophy aside, the discipline only became a little more independent, it began to adopt methods of investigation and theoretical reasoning.
Philosophers ended up noticing an increase in the area of physiology as well and there was a mixture between the two, as they realized that the application of physical and biological methods was already of interest to ancient philosophers and would add to their studies, forming on top of this interdisciplinary the context of modern psychology.
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