analogue is a form of knowledge representation that preserves the main perceptual features of whatever is being represented
cognitive maps are mental representations of the locations of objects and places in the environment. 
cognitive maps are mental representations of the physical environment, particularly in regard to spatial relationships among objects in the environment
declarative knowledge is a recognition and understanding of factual information known about objects, ideas, and events in the environment ("knowing that," not "knowing how"; cf. procedural knowledge)
declarative knowledge is explicit knowledge of various facts. 
dual-code theory is an assertion of belief that information may be represented either imaginally (in nonverbal images) or verbally (in symbolic forms), or sometimes in both forms dual-system hypothesis is a view of bilingualism, which suggests that the two languages are represented somehow in separate systems of the brain
dual-code theory is Paivio's theory that there are separate visual and verbal representations for knowledge. 
functional-equivalence hypothesis is an assertion of belief that although mental imagery is not identical to perception, it is functionally equivalent to perception is that is, it works in about the same way as perception
imagery is the mental representation of objects, events, settings, and other things that are not immediately perceptible to sensory receptors
knowledge representation is a mental form for what individuals know about things, ideas, events, and so on that exist outside their minds
knowledge representations are proposals that attempt to explain how different types of information are encoded and processed. 
procedural knowledge is information regarding how to execute a sequence of operations; understanding and awareness of how to perform particular tasks, skills, or procedures ("knowing how," not "knowing that")
procedural knowledge is knowledge of how to perform various tasks. 
propositional theory is an assertion of belief that both imaginal and verbal information are represented in the form of propositions, which are the meanings underlying various concepts and, relationships among concepts
symbolic is connoting a form of knowledge representation that has been arbitrarily chosen to stand for something and that does not perceptually resemble whatever is being represented