Interaction is action that occurs between two or more entities, generally used in philosophy and the sciences. It may refer to:

Science

• Interaction hypothesis, a theory of second language acquisition

• Interaction (statistics), when three or more variables influence each other

• Interactions of actors theory, created by cybernetician Gordon Pask

• Fundamental interaction or fundamental force, the core interactions in physics

• Human–computer interaction, interfaces for people using computers

• Social interaction between people

Biology

• Biological interaction

• Cell–cell interaction

• Drug interaction

• Gene–environment interaction

• Protein–protein interaction

Chemistry

• Aromatic interaction

• Cation-pi interaction

• Metallophilic interaction

Arts and media

• Interaction (album), 1963, by Art Farmer's Quartet

• ACM Interactions, a magazine published by the Association for Computing Machinery

• "Interactions" (The Spectacular Spider-Man), an episode of the animated television series

• 63rd World Science Fiction Convention, titled Interaction

See also

• Interact (disambiguation)