Conventional computer hardware can not generate visual stimuli with sufficiently high grayscale resolution and measure response times with sufficient accuracy. We describe how to use the VideoSwitcher to produce high-resolution monochromatic displays, and the RTbox to measure response times with high accuracy on conventional computer hardware.
Li, X., Lu, Z. Enabling High Grayscale Resolution Displays and Accurate Response Time Measurements on Conventional Computers. J. Vis. Exp. (60), e3312, doi:10.3791/3312 (2012).