相そう制せい説せつそうせいせつMeanings1nouninteractionismrare termRare philosophical or psychological term for the theory that mind and body are separate but interact. The more common synonym is 相互作用説.See also: 相互作用説相そう制せい説せつは心しん身しん問もん題だいにおける二に元げん論ろんの一いっ種しゅである。Interactionism is a type of dualism in the mind-body problem.