interactionist

plural interactionists

1. human sciencesOne who studies or subscribes to interactionism.

   This view, which we may call interactionist property dualism, differs from the previous view in only one essential respect: the interactionist asserts that mental properties do indeed have causal effects on the brain, and thereby, on behavior.

   1986, Paul M. Churchland, Matter and Consciousness, Cambridge, Massachusetts; London, England: The MIT Press, →ISBN, page 12