Description

Physical Appearance
The Dynavision is approximately 5 foot by 4 foot board containing 64 small red square target buttons arranged in five nested rings. Each button covers a single small light bulb which illuminates randomly when the device is in use. An L.E.D. (light emitting diode) display is situated just above the center of the training surface. The board is wall mounted and adjustable to accommodate users of different heights. A computerized display panel, printer, and membrane control panel are situated on the left hand side of board. The control panel has 37 operating keys, which control four modes, six light speeds, three working areas, four quadrants, 1-7 digits with displays of 1 to .1 second and run times of 30, 60 or 240 seconds.

Using the Device
With these numerous options, a variety of training and testing tasks can be generated using either self paced or apparatus paced modes. In the self paced training mode, (mode A) a target button illuminates in a random location on the board. The user must locate the light and strike it with the hand as quickly as possible. When struck, the light beeps and extinguishes and another target light appears in a random location on the board. The user proceeds to strike the target lights for the duration of the exercise. The numbers of light "hits" are recorded and displayed at the end of the run. In the apparatus paced mode, the light is illuminated for a preselected period of time of 5, 3, 2, 1 or .75 seconds. The user must strike the target within the preselected time to score a "hit". Apparatus paced exercises are more challenging than self-paced exercises.

Options
Different options can be selected to accompany the two modes depending on the needs of the user. Exercises can be preselected to run 30, 60, or 240 seconds. Longer durations are useful for working on maintaining sustained attention; shorter durations for exercises requiring high intensity performance. The board can be programmed so that lights appear within only one quadrant to challenge the user who may have difficulty scanning or reaching in a certain direction. The training surface can also be adjusted between use of the full board (lights in all five rings illuminate) the middle board (the inner 4 rings of the board illuminate), or the inner board (the central three rings illuminate). The middle and inner board surfaces are suitable for children or adults with limited active range of motion or strength. When the flash option mode is used, the L.E.D. display in the center of the board can be programmed to display from one to seven digits periodically during the exercise run. The user must call out the numbers while striking the target buttons, a task which requires the ability to monitor and shift attention smoothly between the central and peripheral visual field. . This program option significantly increases the cognitive demands on the user. Other instructional variations can be used to increase the cognitive requirements of the training tasks. For example, the user may be asked to multiply or add the digits in the L.E.D. display while striking the lights on the board. Or, on B mode, the user may be required to refrain from hitting lights when they appear in certain areas of the board or to strike lights with a certain hand only. On completion of an exercise run, the Dynavision prints outs an analysis of the user's performance, including a comparison of reaction time and accuracy in the four quadrants of board. This provides the clinician with objective data on the user's strengths and weaknesses in performance and assists in evaluation, treatment planning and documentation."

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