 Some of the cognitively motivated researchers working within a representationalist paradigm have been particularly concerned with cognitive architecture, including the associative linkages between concepts, distinctions between types of memories and types of representations (e.g., episodic vs. semantic memory, short-term vs.  long-term memory, declarative vs. procedural knowledge), and the observable processing consequences of such architectures, such as sense disambiguation, similarity judgments, and cognitive load as reflected in processing delays. Others have been more concerned with uncovering the actual internal conceptual vocabulary and inference rules that seem to underlie language and thought. M. Ross Quillian's semantic memory model, and models developed by Rumelhart, Norman and Lindsay (Rumelhart et al. 1972; Norman et al.  1975) and by Anderson and Bower (1973) are representative of the former perspective, while Schank and his collaborators (Schank and Colby 1973; Schank and Abelson 1977; Schank and Riesbeck 1981; Dyer 1983) are representative of the latter. A common thread in cognitively motivated theorizing about semantic representation has been the use of graphical semantic memory models,  intended to capture direct relations as well as more indirect associations between concepts, as illustrated in Figure 3: