In the early 1970s, I read the work ofCharles Tart, Joseph Chilton Pearce, and studied psychology at SUNY Oswego.  Kundalini Yoga was a part of my daily practice.

Frustrated and curious about the perceived limits of the mind, I wanted to build a tester-trainer for psychic abilities. The ESPtest was the first in a series of exercise machines for our minds' untapped, un-accessed reaches.

JB and Louisa Rhine used a set of symbols developed for their ESP research and testing at Duke University.  During those pre-internet days, I somehow tracked down a telephone number for Louisa Rhine and received permission to use the symbols she and her husband developed for their now iconic research.

Once the individual became linked to the unit by activating the touch switch (see the logo?), five symbols would flash: A square, triangle, circle, pair of wavy lines, and a plus symbol. Touching the switch again would cause one of the characters to remain visible.

The object of this cybernetic exercise device was to develop a feedback mechanism for the training of precognition or psycho-kinesis.  If entrainment were successful, the next step in human evolution would be possible.   I collaborated with a now-forgotten individual to build the case and paid electronic engineer Gary Barbieri and his partner to develop the electronics.