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.
Background information about studying Psychology. Psychology is the study of human behaviors using scientific methods to both analyse and explain different human behaviors. It has recently been reclassified by the QCA as a science subject. The course is full of case studies, theories and going in depth about certain behaviors.