Free Software for Measuring Single Switch Use PerformanceBy Romich, Barry; Hill, Katya; Liffick, Blaise W.; CSUN Technology and Persons With Disabilities Conference - 2005,
Publication Date: March 14-19, 2005
Paper discusses the Single Switch Performance Test (SSPT), a free clinical tool to facilitate the measurement of performance using a single switch. The use of a single switch is indicated for users with disabilities who cannot use direct selection interfaces such as keyboards or target-pointing devices. Single switches described include a mechanical button with an internal microswitch; the P-Switch, based on a piezoelectric element that detects slight movement such as raising the eyebrow; and biological sensors that detect intentional, such as EEG (electro-encephalographic), input signals. The SSPT is designed to be integrated into evidence-based practice in the assistive-technology (AT) delivery process. The SSPT software allows a PC to be used to practice switch use and collect switch-use data. The tool measures the time taken to activate and to release the switch, as well as the speed of repeated switch activation. The switch is connected to the PC through a USB mouse. The SSPT includes a Practice Mode and 10 tests each of Activation Performance, Release Performance, and Repetition Performance. Test results can be saved for comparison across time. The common availability of SSPT also allows for collection of data to help AT practitioners understand how people with disabilities learn to use switches. The tool is available for free download at http://www.aacinstitute.org.
Published by: Center on Disabilities at CSUN (Website:http://www.csun.edu/cod/)
Link to text: http://www.csun.edu/cod/conf/2005/proceedings/2147.htm