title: Stimulus contaminants in checkerboard patterns.
abstract: Variations in the mean luminance of a reversing checkerboard produced on a monitor were assessed by two methods and found to be less than 0.3 cd m-2 This quantity is much less than the amount found by other investigators.
mesh_terms: D004560:Electricity; D005069:Evaluation Studies as Topic; D006801:Humans; D010775:Photic Stimulation / Q000295:instrumentation / Q000379:methods*; D013690:Television