Image 2: Tobii Dynavox’s latest eye tracker, known as the PCeye, that is compatible outdoors.
when the eye gaze user’s mouse cursor needs to hover over the intended selection before they can right or left click. Tracking re- fers to when the eye gaze user’s eyes can follow a moving object in any direction across the whole screen. The eye tracker, also known as the PCEye, is the hardware that is able to read an eye gaze user’s eyes. See Image 2, a picture of Tobii Dynavox’s latest eye tracker, known as the PCeye, that is compatible outdoors. Think of teaching eye gaze as breaking everything down into a task analysis. Task analyses can be taught by applying chaining strategies. Chaining strategies are used to teach students multi- step skills. Once the skill is broken down, one can teach the stu- dent the skill in one of two ways: Forward chaining or backwards chaining. Forward chaining is when a skill is broken down into multiple steps. The teacher instructs the student the first step until it is mastered and then subsequently provides prompting until the student completes the skill. Once the first step is mastered, then the teacher instructs the second step to mastery, then provides the student prompting until the student completes each step of the skill. The skill is taught in a “forward” progression. Backwards chaining is when a skill is broken down into mul- tiple steps, the teacher provides prompting until the very last step and teaches the last step until mastery. Once the last step is mastered, the teacher provides prompting to the student until the second to last step, etc. The skill is taught in a “backwards” progression. As previously mentioned, Windows Control and Communi- cator 5 softwares by Tobii Dynavox are two different eye gaze softwares and each have distinct features. In order to determine which software will be the best fit for your eye gaze user, you will need to do a feature matching approach. WINDOWS CONTROL The task bar contains all of the mouse emulation functions for the eye gaze user to execute the tasks that he/she needs to ac- complish. See Image 3 a picture of the Windows Control Taskbar. Refer to Image 4, the chart is titled, “The Meaning of All of the Tasks in the Windows Control Taskbar.”The chart lists the images of each task on the taskbar and lists the action that each task is associated with. When the eye gaze user holds their gaze at the left click icon, he/she can activate a Secondary Click. The user will know that left click, also known as Primary Click, changed because the color will change from a faded color to white. The Tobii Dynavox Support and Training define Secondary Click as,
Image 3: Windows Control Taskbar
Image 4: The chart lists the images of each task on the taskbar on the left and lists the action that each task is associated with on the right.
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