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hci g

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conceptual framework

A structure describing the concepts in a cognitive system, less specific than a cognitive architecture.


In the context of cognitive work analysis, factors that limit, but do not prescribe, how effective work activity might be carried out.

control task analysis

A way of analyzing work that focuses on the control that must be exercised over a work domain and the tasks implied to exercise such control. An analytic phase of cognitive work analysis.

controlled cognitive processes

Processes that require monitoring and effort or attention during their execution. See also automatic cognitive processes.

conversation analysis

Originated by Harvey Sacks, this is often coupled with ethnomethodology and is the study of the way in which conversationalists order and accomplish their exchange of speech with each other as a situated and locally organized matter.

conversational agents

software agents that are interact with the user using natural language and that are often given a human-like appearance

cost structure of information

An analysis of the resource and opportunity costs involved in accessing and handling information from a physical or virtual information system.


A version of GOMS developed by John in the 1980s that explicitly joined GOMS to the model human processor. It included perceptual and motor operators as well as cognitive operators. Perceptual, cognitive, and motor operators could run in parallel, subject to resource and information dependencies. More information can be found in Gray, John, & Atwood, 1993; John 1988, 1990; John & Gray, 1992, 1994, 1995.

critical path

The path through subtasks (operators) in a PERT chart that determines the length of the total task. Used in CPM-GOMS.


See computer-supported cooperative work.

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