We can give you the
dry, textbook definition......
But describing scanning is nothing like seeing scanning, so here is a computer simulation. After you look at it for a moment, read further as we describe the aspects of scanning that are important to understand.
In the scanning demo above, you should note the following;
1) This is single switch scanning. When you click your mouse on the "switch" the scanner will select the item that was highlighted at that moment. Go ahead and practice writing some words.
2) You can control the scanning speed in this demonstration. When you click on "slow" or "fast" you will see that you can make the cursor travel at different rates through the selection set. You should practice in particular with the "fast" scanning speed and see how difficult it can be to compose a message accurately when the speed is too fast for you.
3) The scanning shown here is "linear" where the cursor moves from one item to the next through the entire set. You can see how slow linear scanning is. We will present other scanning patterns shortly.
4) This is scanning with the alphabet as the selection set. Scanning can also be done with simple line drawings, complex symbols or printed words as we will show you.
Continue on to "Scanning