Another possibility is that only a portion of one molecule is transferred to the other molecule. This type of reaction occurs, for example, in redox and acid-base reactions. In redox reactions, the transferred particle is an electron, whereas in acid-base reactions it is a proton.
Psychology is the study of mind and behavior. It is an academic discipline and an applied science which seeks to understand individuals and groups by establishing general principles and researching specific cases.
Psychology is the study of the mind and behavior, according to the American Psychological Association. It is the study of the mind, how it works, and how it affects behavior. The APA adds that it embraces all aspects of the human experience, from the functions of the brain to the actions of nations, from child development to care for the aged.