In keeping with a plan for overall testing of the timing and sequencing of brain processes, testing techniques are introduced for timing short-range mental scanning without eye movement. The tests, using a personal computer, reveal the tendency to scan from left to right, even when there is insufficient time for eye movement, in persons whose first language is one which is read from left to right. The tests depend on the use of blocking stimuli which operate on central processes rather than peripheral processes, and suggest that it is possible to measure the timing and sequencing of central brain processing thereby.