Use association for a named body such as a professional group, residents group, trade body, or sports organization.
Use association for a link created by contact, collaboration, reputation, or shared history, especially in phrases like in association with and guilt by association.
| Incorrect | Correct |
| The museum worked in association of the university. | The museum worked in association with the university. |
| His association to the campaign lasted ten years. | His association with the campaign lasted ten years. |
| They association with several charities. | They associate with several charities. |
| The city has an association on mining. | The city has an association with mining. |
Use association when one smell, word, place, or event calls up another idea or memory.
| Incorrect | Correct |
| I have a strong association to that song. | I have a strong association with that song. |
| The child made an association of the bell and food. | The child made an association between the bell and food. |
| The smell gave me many association. | The smell gave me many associations. |
| This color associates childhood memories. | This color has associations with childhood memories. |
Use association in research, statistics, data mining, and modeling for a link that can be measured or represented, while keeping it distinct from proven causation.
| Incorrect | Correct |
| The study found an association, so stress caused the illness. | The study found an association, but it did not prove that stress caused the illness. |
| There is an association of the two variables. | There is an association between the two variables. |
| The UML class has an association to Customer and Order. | The UML diagram shows an association between Customer and Order. |
| The association rule proves why customers buy milk. | The association rule shows that customers often buy milk with another item. |
Use association for bodies that people join, links created by involvement or reputation, ideas that call up other ideas, and technical relationships that are linked without necessarily being causes.
Association is confused with associate, paired with the wrong preposition, or treated as proof of cause when it only names a measured link.
From Medieval Latin associatio, from Latin associare, meaning to join or unite with, built from ad- meaning to and socius meaning companion or ally. English has used it since the sixteenth century for joining together, then for groups and mental links.