Examples of ATs that can be used to meet the needs of students with hearing disabilities include digital audio recording of lectures (that may be streamed online) and captioning and subtitles to ensure that information provided in audio format is also provided in a visual medium (Wald 2002). Examples of assistive technologies that can meet the needs of students with visual impairments include screen magnification software and speech output systems consisting of a speech synthesizer and screen reading software (Neumann 2002). Draffan (2002) outlines AT for dyslexic students including speech output systems (text being read back through synthesized speech); spell-checkers and speech recognition software. Henderson (2002) describes the kinds of AT that students with physical disabilities may use including alternative input devices such as switches, head mice or voice and keyboard emulators.
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