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WE'RE BACK!

October 2025 lilbrary presentations return for another season of lively multi-media presentatioins on "ghost hunting" with from a skeptical viewpoint, including high-tech pseudoscience, skeptical inquiry, critical and thinking pitfalls like cognitive biases. Free admission and open to the pubic. Note: Portions of this presentation may not be suitable for very young audiences.

When and where?

Oct. 21, 6-8pm

Kensington Branch Library

4121 Adams Ave, San Diego, CA 92116

Oct. 28, 5:30-7:30pm

Paradise Hills Branch Library

5922 Rancho Hills Dr, San Diego, CA 92139

honoring the heroes of

skeptical inquiry

Frank’s Spirit Box: A device created by Frank Sumption that generates white noise manipulated to coincided randomly with the voltage tuning of an AM radio receiver. This generates a moment of sound in the AM broadcast range of 535 - 1605 kHz, which is then acoustically enhanced. Sumption believed spirits could communicate via the modulated radio waves. The spirit box is largely dismissed as quackery, along with other random sound generating instruments such as digital dowsing rods and the Ovilus.

click for team bios

Residual Haunts

In "Residual Haunts: Why Is This Happening Again & Again?" Tim Mountain reviews the basics of a certain classification of paranormal activity: the recurrent haint, also known as a residual haunting,

PPI Podcast #10: Evidence Analysis (2011)

Part 3 of our presentation: Science & Beyond - A Look at the Science Behind 21st Century Paranomrmal Investigation - is entitled Evidence Analysis - Wrong Thinking, Seeing Ain't Believing and Can You Hear Me Now? Presented by PPI President Karl Sherlock.

Recorded October 11, 2011

Length: 00:35:48