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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

Controls: Just as scientists and researchers attempt to put parameters on their experiments in order to limit such factors as margin of error and unreliability, PPI investigators will exact such controls on the environment of the investigation so that our analysis will lead to more reliable results. Controls may be as simple as limiting the number of individuals within the venue, to more sophisticated matters such as triangulation of audio sources. Controls are considered an essential feature to any application of the Scientific Method.

click for team bios

Surveillance Logs

For many reasons, establishing and following a clear set of surveillance protocols during investigations is crucial. For starters, anyone claiming to honor the scientific method in paranormal investigating understands the importance of controls. By “controls,” we mean those precautions taken to contain how data is collected, to limit contamination of that data, and to identify potential misinterpretations and false positives....

PPI Podcast #4: Critical Thinking (2009)

Part 3 of PPI's presentation: Science and Beyond - An Educated Look at Ghost Hunting, is entitled Critical Thinking and Logic. Presented by PPI President and Co-Director Karl Sherlock.

Recorded March 21, 2009 at Grossmont College, El Cajon, California

Length: 00:17:04