Type can mean a number of things of relevance to psychologists:

• Type theories of personality

• Biological type, which fixes a scientific name to a taxon

Type in mathematics and statistics can also refer to:

• Type (metaphysics), in metaphysics and ontology

• Equivalence class, in set theory and musical set theory

• Type (model theory), in mathematics

• Arity of an operation, in mathematics

• Signature (mathematical logic)

• Theory of Types, a means by Bertrand Russell to further discuss the mapping of mathematics to logic in philosophical logic

• A proposition or a set in the Intuitionistic Type Theory

See also Edit

• Typology, the study of types

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