hci g

hci g

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The process by which common ground is developed.

Guiard’s model of bimanual control

A model that describes the roles of the hands in performing tasks that typically involved two hands, one being dominant or preferred and the other being nondominant or nonpreferred.

Gulf of Evaluation

the psychological distance between what is displayed by a computer and the user’s understanding of how it relates to current task goals

Gulf of Execution

the psychological distance between the task goals of a user and the actions required to achieve these goals with a computer system



A standard operator in a keystroke-level model (KLM), H represents the act of homing the hands between input devices, such as between the keyboard and the mouse. It was empirically determined to take 400 msec by Card, Moran, and Newell (1980b, 1983).

halting problem

Early in computing theory, it was established that it was impossible to produce a program that can reliably tell whether any program will eventually halt (rather than run forever). As well as its intrinsic significance, this is typical of a range of impossibility results that establish the fundamental limitations of computation.

heuristic evaluation

a user interface critiquing process carried out by experts with usability guidelines

hidden dependencies

Important but invisible links between entities in the cognitive dimensions framework. Frequently the links are visible in one direction but not in the other (cell dependencies in spreadsheets, for example). See the text for more details.

Human short term memory

It has been shown that humans' short term memory contain 7 plus or minus 2 units. That is, it is not very big. In addition, short term memory is really short.

human-computer interaction

situations in which people understand and make requests of a software system, and the system interprets and responds to these requests

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