Scanning the issues

For more than a hundred years, scientists have attempted to determine the truth or falsity of claims for the existence of a perceptual channel whereby certain individuals are able to perceive and describe remote data not presented to any known sense. And for the past three years, a program in the Electronics and Bioengineering Laboratory of Stanford Research Institute (SRI), Menlo Park, Calif., has been underway to investigate those characteristics of human perception that appear to fall outside the range of well-understood perceptual/processing capabilities.