Karl Zener

Karl Edward Zener (April 22, 1903 – September 27, 1964) was a perceptual psychologist best known for his affiliation with Dr. Joseph Banks Rhine and their work in the field of extra-sensory perception (ESP).

[3] Zener's later work focused on theories of perception and the analysis of perceptual experience.

With research partner Dr. Mercedes Gaffron, he identified previously unknown aspects of visual processing and comprehension.

The resultant Zener-Gaffron theory combined a psychological analysis of perception with then-contemporary findings from the field of biological neuroscience.

[4] Zener was the recipient of the only grant ever given for psychological research by the Ford Foundation Program in Humanities and the Arts.

Early parapsychological research used Zener cards in experiments designed to test for the existence of telepathic communication .