Even though researchers regularly use neutral affect induction procedures as a control condition in their work, there is little consensus on what is neutral affect. This article reviews five approaches that researchers have used to operationalize neutral AIPs: to produce a minimal affective state, in-the-middle state, deactivated state, typical state, or indifferent state. For each view, the article delineates the theoretical basis for the neutral AIP, how to assess it, and provides recommendations for when and how to use it. The (...) goal of the article is to encourage researchers to state their theoretical assumptions about neutral affect, to validate those assumptions, and to make appropriate conclusions based on them. (shrink)