Assistive Technology Professional (ATP) Practice Test 2025 – All-in-One Guide to Master Your Certification!

Step scanning is a method used in assistive devices that allows users to make selections through a sequential process, typically involving multiple steps. The key feature of step scanning is the ability to utilize two switches: one switch is used to navigate through options or items, while the second switch is used to make a selection once the desired item is highlighted or focused on. This two-switch system effectively allows users who may have limited motor control to interact more with technology by breaking down the selection process into manageable steps.

By contrast, single switch use for selection limits the navigation and choice process to one input, requiring the user to make selections through repeated activations. Visual and auditory feedback enhances user experience but does not define the selection method itself. Continuous linear selection implies a more fluid process where items can be selected without definite stops, which is contrary to the intentional stop-and-select method used in step scanning. Thus, the two-switch approach in step scanning is critical for allowing structured interaction with assistive devices.