Stimulus Duration
*Pixels are not on continuously during a frame
*In part this is necessary for clean motion
*Typical CRT phosphors last about 4 msec. (Bridgeman, 1998)
*On LCD and other technologies, persistence is longer
*Makes motion less clean but flicker less noticeable
On clean motion:  observe lcd’s which are generally slower and thus on longer and recall the old green monochrome monitors on the early PCs


Bridgeman, B. (1998).  Durations of stimuli displayed on video display terminals: (n-1)/f+persitence.  Psychological Science, 9, 232-233.