Mark V PSE Deception/ Detection Kit, 1970's/1980's
The Mark V Psychological Stress Evaluator was a high end PSE Kit that would detect deception in the human voice. In the 1970's and 1980's private investigators were able to obtain a huge volume of assignments in the form of pre-employment screening using these units. Today, such tests for pre-employment screening are outlawed. The Mark V PSE Deception/ Detection Kit was built into a briefcase with a good Panasonic cassette tape recorder and a readout that would detect and provide PSE readings.

What Is PSE
PSE stands for Psychological Stress Evaluation. It was developed by the US Military in the 1960's an an alternative to the polygraph. It became highly popular since there was no need for direct connection to the subject's body. It became a sort of "remote lie detector" since one could record conversation on a high quality recorder and then later analyzed on a PSE. The technique is based on the recognition of an involuntary voice tremor that can not be heard with the naked ear which is present when on attempts deception or lieing or is under emotional stress.

These units sold from $6,500 to about $9,500 depending upon the model and time of purchase. Today, this same type of technology is in digital form and can be obtained in software program costing a small fraction of what these analog machines cost.

Click Here to Review Current Technology
.

From The Ralph D. Thomas PI Vintage Collection
THOMAS INVESTIGATIE PUBLICATIONS, INC.
NATIONAL ASSOCIATION OF INVESTIGATIVE SPECIALISTS, INC.
SPY EXCHANGE AND SECURITY CENTER
P O Box 82148, Austin, Texas 78708
Showroom: 9513 Burnet Road, Austin, Texas 78758
Phone 512.719.3595 Fax 512.719.3594
Email: RThomas007@aol.com

New Generation Deception/Detection Technology

Review Current State-of-The-Art Investigative Audio Recorders

THE TAPE RECORDER SHOP!
LONG PLAY RECORDERS AND TELEPHONE RECORDERS

Telephone Tape Recorders, Long Play Recorders, Micro Recorders, Desktop Recorders, Recorder Detection Digital Recorders, Body Audio Recorders, Long Play Recorders, Dialed Number Loggers And Decoders, Lie Detection. Working Writing Pen Recorders, Watch Recorders For Men And Ladies! Special Function Recorders!
Combo Combo-Multifunctional Recorders With Digital Cameras And More!

Spy Exchange & Security Center
9513 Burnet Road Suite 101, Austin, Texas 78758
Phone 512-719-3595, Fax 512-719-3594
When In Austin, Texas--Stop By Our Huge Showroom

What's New In Audio Recorders Combo Digital Audio Recorders
High Grade Micro Digital Recorders Econo Digital Audio Recorders
Long Play Automatic Telephone Recorders Analog Long Play Audio Recorders
Working Writing Pen Audio Recorders Law Enforcement Grade Recorders
Watch Audio Recorders/MP3 Players Tape Recorders Accessories

 

What's New Books Equipment Software Links
NAIS Find A PI Certifications Resources Clothing
Badges ID Cards Cop Shop Members Our Staff
PI News PI Daily PI Radio Show Gift Ideas Become A PI

Return To The Spy And PI Vintage Pages

Copyright: 2006, Thomas Investigative Publications, Inc. All rights reserved.
Thomas Investigative Publications, Trademark, 1981.
National Association Of Investigative Specialists, Inc, Trademark, 1986.
Spy Exchange, Trademark, 1999