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---
created: 2025-07-23
updated: 2025-07-23
title: Karl Zener
tags:
- person
- psychologist
- parapsychologist
description: Karl Zener was an American psychologist and parapsychologist known for developing the Zener cards used in ESP experiments.
---
[[Karl Zener]] was an American psychologist and parapsychologist. He is best known for developing the [[Zener Cards]] in the early 1930s, which became a standard tool for testing [[ESP]] (extrasensory perception) in [[Parapsychology|parapsychological]] experiments. Zener collaborated with [[J. B. Rhine]] at the [[Duke University Parapsychology Laboratory]].[^1]
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[^1]: Jacobsen, Annie. *Phenomena: The Secret History of the U.S. Government's Investigations into Extrasensory Perception and Psychokinesis*. Little, Brown and Company, 2017.