In this paper, individuals with no background in cognitive psychology are provided an introduction to the cognitivists' concepts of prototypes, schemata, and superordinate relations. A prototype is a most-typical instance, a composite, or an average of items in a particular set and serves as a mental representation of the set. A schema, script, or story grammar is a sequence of features that typically occur in a common event or story. The term "superordinate relations" refers to "links" between specific concepts and superordinate concepts in a "semantic network." Described in the paper are the kinds of empirical evidence on which these inferred mental entities are based. In addition, possible behavioral interpretations are suggested for prototypes and schemata. The evidence of superordinate relations is considered to be difficult to interpret both behaviorally and cognitively. (RH)