Simulations

http://www.pbs.org/wgbh/misunderstoodminds/
attention.html - distraction simulation

http://www.webaim.org/simulations/
screenreader-sim.htm - screenreader simulation

http://www.webaim.org/simulations/
lowvision-sim.htm - low vision simulation

http://www.webaim.org/simulations/dyslexia-sim.html - dyslexia simulation