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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

Baselines: Investigators use a baseline measurement of environmental conditions to determine environmental anomalies during the investigation. Measurements of temperature, radiation, electromagnetic fields, air density and pressure, and others are systematically recorded to determine what’s "normal" about the site; departures from those baselines, therefore, potentially suggest what could be abnormal or paranormal. Many groups use weather, solar and geological data as well, in order to create a baseline for the region of the investigation. 

click for team bios

EVP: Acoustic Energy or Psychic Imprinting?

The subject of Electronic Voice Phenomena or EVP has provided some of the most compelling evidence of paranormal activity ever captured. But the most intriguing characteristic of Electronic Voice Phenomena is that anyone with a quality recorder can capture it; the phenomena is available to any one willing to spend the time to investigate and carefully analyze their recordings.

Interview with Karl Sherlock

PPI President and Co-Director Karl Sherlock gave this interview for a journalism student at Grossmont College who was interested in paranormal investigation. The interview took place in April 2013.