What Is Skin Potential Level?
Skin potential level (SPL) is the tonic (baseline) electropotential of the skin.
Significance in PDD
This concept is part of the theoretical and practical framework supporting Deception">psychophysiological detection of deception. Understanding it helps practitioners, researchers, and informed consumers appreciate the scientific foundations of modern polygraph testing and the ongoing refinement of techniques and methods based on empirical research.
Further Reading
For comprehensive information on polygraph science, visit the polygraph glossary, the research database, or the Polygraph Examiner Hub for professional resources.
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.
The physiological principles underlying this concept are covered in the training curriculum of APA-accredited polygraph schools and form part of the knowledge base required for competent forensic psychophysiology practice. Understanding these principles helps examiners make informed decisions about data quality, suitability, and scoring.