psychology is seen as philosophy - experimental philosophy.
1879:
Wundt (father of psychology) opened the first psychology lab in Germany. He introduced the idea of introspection and structuralism.
1900s:
Freud developed the psychodynamic approach, he put an emphasis on the role of the unconscious mind in behaviour.
1913:
Watson & Skinner established the behaviourist approach
1950s:
Rogers & Maslow established the humanistic approach
1960s (1):
Development of the cognitive approach. Computers were used as a metaphor for the human mind.
1960s (2):
Bandura established social learning theory. A focus on cognitive factors in learning - bridges the behaviourist and cognitive approaches.
1980s:
The biological approach was established/became popular. Understanding of the brain and physiological processes increased because of increased technology.
C21st:
cognitive neuroscience was formed. The cognitive and biological approaches were combined.