There are many situations in assessing product or system usability where it is desirable to know where a person is looking.Currently , eyetracking systems that provide this capability are rarely found in organizations that are involved in usability engineering. In contrast, one of the unique features of the Contel Intelligent System's Usability Laboratory (recently merged with GTE Laboratories) is the Eyegaze System, an eyetracking system, developed by LC Technologies. Our desire is to implement an approach for characterizing a computer user's ocular "behavior" in a way that supplements the measures of performance that can be derived from observations of overt behavior. This presentation will describe an eye movement study conducted using PRODIGY Display Screens, highlighting the use of the Eyegaze System as a usability tool. A short video will be presented (1) showing the Eyegaze System as an integral facet of the usability laboratory, and (2) showing results of the type of study that can be performed using an eyetracking system for usability assessments.

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The soldier-computer interface (SCI) has become increasingly the principal focus of the man-machine interaction. As such, it represents a critical element to be assessed during human factors engineering test and evaluation. Inadequate design of displays and input/output devices such as keyboards can degrade system performance below levels necessary for functional effectiveness. Delays and errors that occur at the operator's console are translated directly into reduced system effectiveness. Adequate human factors test and evaluation requires the development and application of a sound methodology and criteria for testing and evaluating the effectiveness of display and input-output devices of the soldier-computer interface. This paper reviews the development of the methodology and criteria used to assess the SCI by the U.S. Army Test and Evaluation Command (TECOM).

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