It is essential to have a conversation about how your students will interact with and access their communication devices if they have a physical disability and use augmentative and alternative communication (AAC). There are two ways students access their AAC: direct selection or indirect selection. In direct selection, students may directly point to their responses or devices with their fingers or thumb without any additional support. If students need more help, many settings can be adjusted and assistive technology tools can be considered. You can increase the space, use key padding between buttons, increase the amount of pressure required to activate the button, or even adjust how long the button should be held to initiate activation. You can use a keyguard or a plastic frame with holes to help students press the intended button more accurately without accidental hits. Some students may require an adapted stylus, head pointer, eye gaze, or use of their feet or other body parts to indicate what they want to say. Here are resources that can help you determine which access options are best for your students:
WATI Section 3: Computer and Device Access: This document (Section 3: Computer Access) can be used to gather essential information on how a student might access a computer or electronic device.
Access Screening Tool*: This tool will help you determine how your student might physically interact with their communication device.
Direct Access Checklist*: This form provides guidance on collecting information, including body parts used and settings needed on the device, for students who access their communication devices using direct selection.
If students cannot use their hands, eyes, or other body parts to access materials directly, they can use indirect selection. Students can use two strategies to communicate using this method: switch scanning or partner-assisted scanning. Many communication devices, computer programs, and iPads have switch scanning built into the settings. With a computer interface plugged into the electronic device, students can press one or more switches to indicate their response when the desired word or picture symbol is highlighted. Another option is to explore partner-assisted scanning. Partner-assisted scanning is a low-tech indirect selection method for accessing communication that is used if students cannot use their hands, eyes, or body to access materials directly. It can be used as a strategy to teach scanning on high-tech devices or if an electronic means of scanning is not available or possible for various reasons. In partner-assisted scanning, the student gives a recognizable and predetermined yes or no response through a body movement, vocalization, or a switch as the support member verbally and visually presents each option to the communicator (Bayldon & Clendon, 2017).
Here are several resources that may assist in determining the approach needed to set your student up to access their device indirectly:
Scanning Observation Form*: If you determine that your students will access their device indirectly using switch scanning, this form will help you identify the specific setup details needed.
SwitchSite Location & Positioning Chart*: Use this chart to help you determine which body part your student will use to access a switch used in scanning.
*These linked documents with a star are free from Tobii Dynavox. You will need to log in or create a free account to download them.
Reference
Bayldon, H. & Clendon, S., (2017). Partner assisted scanning: Enable the unexpected. Journal of Clinical Practice in Speech-Language Pathology, 19(3), 142-15.
For more information, contact Sharon Jones (scjones@vcu.edu), Program Specialist, T/TAC at VCU.
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