Which scanning method requires the user to press a switch to move from choice to choice?

The correct answer is step scanning, which is a method that requires the user to actively press a switch to move through a series of choices. In this method, the user scans options sequentially, and with each press of the switch, they navigate to the next choice in the list. This allows for controlled and deliberate selection of items from a predetermined set.

In step scanning, the user remains actively engaged throughout the scanning process, as they initiate the movement through the options. This is particularly useful for individuals who may have limited motor control or require a more structured approach to make selections.

Other scanning methods, such as inverse scanning or automatic scanning, have different mechanisms where the user may not need to actively press a switch for every choice. In inverse scanning, the scanning process can move backward through options, while automatic scanning cycles through choices on its own, requiring the user to make selections when ready, rather than controlling the scanning speed or sequence actively. Traditional keyboard input, on the other hand, relies on direct and immediate input from a keyboard rather than a scanning choice method.