Psychology
Psychology is the science of experiences and behaviors. Interest is focused on various aspects of human interaction with the outside world.
Some important prerequisites for this interaction are perception, thought, emotion and will (cognitive psychology). The development of these features (developmental psychology) to the characteristic patterns for different individuals (personality) and the differences between individuals and groups (differential psychology) are important areas.
People are biological creatures, and therefore biological psychology and neuro psychology are important areas related to the natural sciences.
But people are also a product of the external environment, both physical and social. Within psychology the interaction between humans and the environment is studied. In social psychology other people are the important elements in the environment.
In its applications psychology aims to contribute to health and welfare by clarifying human needs and limitations. Therefore methods are developed to influence and treat people as well as environments.
The Greek letter Psi is often used as a symbol of psychology.

Clinical psychology
Clinical psychology refers to professional activities that aim to prevent, cure and alleviate human suffering and mental components of ill health, as well as systematic exploration of the origin, development, diagnosis, assessment, treatment and prevention of clinical mental conditions.
Clinical psychology

Personality, social and developmental psychology
Personality psychology studies such inherited and acquired psychological structures and processes that in a systematic way vary between different individuals and contribute to organization (coherence), continuity and stability (consistency) in the person's behavior.
Personality, social and developmental psychology

Work and organizational psychology
Work and organizational psychology is the study of individuals’ work-related experiences, perceptions, reactions, and actions in relation to work matters and organization, individual expectations, and the ways in which individuals comprise and/or interact with groups and organizations.
Work and organizational psychology
