To find out whether a nonnormalized model is indeed a better predictor of thematic fit than a normalized model, we also run experiments with a normalized version of the model presented in Section 3.2: Someone familiar with the literature on human categorization behavior might recognize Equation 7; this model is actually simply a Generalized Context Model (GCM) (Nosofsky, 1986), with the 'context' being restricted to the k nearest neighbors of the target item.
we will refer to this model using the shorthand kGCM.