Definitions for "Reductionist"
An approach to the study of a phenomenon in general which reduces its multiple dimensions and facets into a few ones which can be manipulated within some form of a formal model of the phenomenon.
The behaviourist approach is often accused as being reductionist. This means reducing our behaviours to mere stimulus-response associations. It ignores for example the influence of our cognitions (perception, attention, language, memory and thinking). The biological approach is similarly reductionist. This is because it explains thoughts, feelings, and behaviours in terms of neurons, hormones etc. The biological approach with this biological lowest common denominator view ignores the influence of our cognitions on our behaviours.
Keywords:  arguments, theory, relating
of or relating to the theory of reductionism; "reductionist arguments"
believing that a single factor causes social change