The following events in the history of psychology took place in 1890.
- Introducing the notion of "Mental Tests", James Cattell starts the development of psychological assessment and psychometrics.
- Francis Galton develops statistical correlation to explore the interrelationships of factors in intelligence.
- William James publishes Principles of Psychology.
- James Cattell publishes Mental Tests and Measurements.
1885 - 1886 - 1887 - 1888 - 1889 - 1890 - 1891 - 1892 1893 - 1894 - 1895