Home | Contact  

Scanning access

With switch-based scanning, a highlight moves or scans across the keyboard. Select the switch to choose the key you want and WiViK sends it to a word processor, e-mail message, web page or other text based application you may be using. With WiViK you can also use the switch to open menus, edit text, move or resize windows, jump to other applications or move the mouse pointer.

While there are several standard scanning strategies available, WiViK also lets you define your own unique strategy based on your abilities and preferences. By choosing the number of switches (1 – 6), the basic scanning method (automatic, directed, inverse/step etc.) and the pattern of scanning movement you prefer (item, row/column, quadrant) you create your own personal scanning strategy which will make accomplishing your tasks easier and faster.

      Scanning options dialog

Automatic scanning

In automatic scanning, groups or items are automatically highlighted or scanned in sequence. The highlight pauses at each group/item for a preset time.

When you activate (press and release) the select switch, scanning begins across smaller groups or individual items. If you click the select switch when an individual item is highlighted, that item is selected. One or two switches are usually used with automatic scanning with select and cancel actions assigned to switches.

You must be able to activate the switch within the preset time to make a selection.

Inverse/step scanning

With inverse scanning you advance the highlight by holding the select switch down. While the switch is held down, the highlight pauses at each item for a preset time.

Step scanning is a variation where you advance by repeatedly activating the select switch. Sometimes, step and inverse scanning are combined.

The advantage of inverse/step scanning is that timing is not as critical as with automatic scanning. Groups or items are selected with a select switch or by dwelling. Typically two or three switches are used with move, select and cancel actions assigned to switches.

Directed scanning

Directed scanning matches separate switches with moving the highlight across individual keys. These switches are used in a step or inverse fashion.

The switches are often housed in a gated joystick, allowing users to direct the scanning cursor as they would drive an electric wheelchair. Items are selected by activating the select switch, or by dwelling for some period. Directed scanning requires the greatest degree of control.

Switch connection

Switch Interface Cable (joystick connection)

The Switch Interface Cable is used with the WIVIK 3 on-screen keyboard to provide switch scanning for an individual. Provides two single switch connections.

Switch interface cable

Switch Interface Box (USB connection)

The Switch Interface Box is used along with the WIVIK 3 on-screen keyboard to provide switch scanning for an individual. It is connected through the USB port and provides up to six single switch connections, two dual switch connections and a joystick connection.

Switch interface box

 
 
   
Privacy Statement   |   Terms of Use   |   Copyright
© 2010 Holland Bloorview Kids Rehabilitation Hospital All rights reserved
 
Holland Bloorview Kids Rehabilitation Hospital
Developed through research at
Holland Bloorview Kids Rehabilitation Hospital
 
           Ontario Rehabilitation Technology Consortium
Ontario Rehabilitation
Technology Consortium
           The Health Technology Exchange