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.

Couples therapy. Photo: SHVETS production from Pexels.

Psychobiology and epidemiology

Researchers discussing an fmri picture of the brain. Photo: Jens Olof Lasthein

Clinical psychology

Psychotherapist with client (genre picture). Photo: Sozavisimost from Pixabay

Cognitive psychology

Wordcloud in the shape of a brain. Picture by John Hain from Pixabay

Perception and psychophysics

Ljudas at the lakeside. Photo: Östen Axelsson.

Personality, social and developmental psychology

Youth showing their green finger and toe nails, in a ring on grass. Photo: Pixabay.

Work and organizational psychology

Person at desk with laptop, mobile, notepad and a mug of latte. Photo: Firmbee från Pixabay.