Psychology is the science of _______:

The word ‘Psychology’ is a combination of two words (both Greek):‘Psych’ which means ‘Soul’ and ‘Logos’ which means 'thought'.

Psychology is defined as the science of behavior that can be observed and measured.
Sometimes some scholars have termed it as the science of consciousness. It is difficult to define psychology as it has a very vast scope. The most accepted definition today is psychology is the science of human behavior and mental processes.