Polygraph Glossary Technique

thermal imaging

Definition

Thermal imaging uses infrared cameras to record radiant energy from the body. Facial thermal pattern changes correlate with physiological arousal, and preliminary evidence suggests thermal imaging can discriminate between truthful and deceptive individuals above chance. The technology is non-cont...

What Is Thermal Imaging?

Thermal imaging uses infrared cameras to record radiant energy from the body. Facial thermal pattern changes correlate with physiological arousal, and preliminary evidence suggests thermal imaging can discriminate between truthful and deceptive individuals above chance. The technology is non-contact but remains at an early research stage.

References

See: Pavlidis, Eberhardt & Levine (2002).

Historical and Modern Context

The evolution of polygraph instrumentation — from early mechanical devices to modern digital systems — reflects the broader advancement of the field from subjective interpretation to validated, structured test data analysis. Modern instruments from manufacturers such as Lafayette, Limestone, and Stoelting incorporate multiple measurement channels, digital recording, and computerised scoring capabilities.

Professional Context

This concept forms part of the knowledge base expected of qualified forensic psychophysiologists. Training at APA-accredited schools covers the theoretical foundations, practical applications, and research evidence underlying all aspects of polygraph methodology. Ongoing continuing education ensures practitioners stay current with developments in the field.

Cross-references

More technique terms in this glossary

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