sīˈkäləjē, -ji sometimes sə̇ˈk- noun
( -es )
Etymology: New Latin psychologia, from psych- + -logia -logy
1.
a. : the science of mind or of mental phenomena and activities : systematic knowledge about mental processes : a method of obtaining knowledge about mental processes
b. : the science of behavior : the study of the interactions between the biological organism (as man) and its physical and social environment ; also : systematic knowledge gained through such study
2. : the mental, attitudinal, motivational, or behavioral characteristics of an individual or of a type, class, or group of individuals
the psychology of the fighting man
mob psychology
also : such principles pertinent to a particular field of knowledge or activity
color psychology
the psychology of power and leadership — Norman Cousins
the psychology of learning
3. : a treatise on or a school, system, or branch of psychology