The CFN Journal
Articles detailing the intersection of Forensic Psychophysiology, Investigative Psychology and Cyber Psychology.
How confidence-based reporting supports therapeutic disclosure, accountability, relationship recovery, and informed decision-making in polygraph examinations.
Read ArticleCredibility, reliability and factual truth are different concepts. Drawing on Brennen, Blandhol & Magnussen (2026), Dr Keith Ashcroft explains why looking honest does not mean being correct, and what investigators, lawyers and polygraph examiners should do instead.
Read ArticleA trauma-informed and professionally defensible approach to polygraph examinations involving alleged victims and witnesses, focused on statement verification, safeguarding and investigative support.
Read ArticleA balanced, journalist-friendly explanation of polygraph accuracy, sensitivity, specificity, PPV, NPV, base rates, false positives and why headline accuracy claims can mislead.
Read ArticleAn authoritative, forensic-oriented visual and behavioural checklist to spot deepfakes, voice cloning, and AI scams. Protect your organisation and verify digital evidence.
Read ArticleDr Keith Ashcroft explains how screening polygraph results can be reported using structured High, Medium and Low Risk bands based on six key inputs including the polygraph outcome, disclosures, collateral information, seriousness, base rates and examiner–algorithm agreement.
Read ArticleDr Keith Ashcroft explains why polygraph accuracy figures from meta-studies depend on base rates, and how positive predictive value, negative predictive value, sensitivity and specificity affect the real-world meaning of a polygraph result.
Read ArticleAn explanation of the British One-Issue Screening Test (BOST), single-issue polygraph screening, directed-lie comparison questions, and a cautious adaptation using six repeated presentations of the same relevant screening issue.
Read ArticleA professional UK guide on asking a partner to take a lie detector test, including consent, suitability, relationship safety, question formulation, limits and alternatives.
Read ArticleA professional UK guide to infidelity polygraph test questions, explaining what can be asked, what should be avoided, consent, question formulation and limitations.
Read ArticleA professional UK guide explaining when a polygraph examination may assist with false allegations, its limitations, suitability factors, question formulation and legal safeguards.
Read ArticleDr Keith Ashcroft explains why UK polygraph examination fees vary and what affects the cost, including case complexity, venue, travel, preparation, question formulation and reporting.
Read ArticleA professional guide by Dr Keith Ashcroft explaining what to check before booking a lie detector test, including training, ethics, question formulation, consent, reporting and suitability.
Read ArticleThe King’s Speech 2026 proposes polygraph testing as a licence condition for state threat offenders under the National Security Bill. Dr Keith Ashcroft explains what this means for UK offender management and public protection.
Read ArticleA UK-focused guide to asset forfeiture polygraph examinations, hidden assets, financial disclosure, confiscation proceedings and professional credibility assessment by Dr Keith Ashcroft.
Read ArticleA professional guide for therapists and counsellors on helping clients prepare disclosure statements for therapeutic polygraph examination, including scope, timing, reporting and professional boundaries.
Read ArticleA practical, reassuring guide by Dr Keith Ashcroft explaining how to prepare for a polygraph examination, what to expect, and how to approach the process calmly and confidently.
Read ArticleA practical guide for polygraph examiners on choosing defensible prior probabilities in event-specific, screening, therapeutic, and risk-management examinations.
Read ArticleDr Keith Ashcroft explains Raymond Nelson's research on prior probabilities, Bayesian reasoning and multiple-issue polygraph screening, and what it means for structured risk-management decisions.
Read ArticleA professional guide by Dr Keith Ashcroft on disclosure polygraph examinations for compulsive sexual behaviour, relationship repair and recovery support.
Read ArticleHM Government extends polygraph testing for high-risk offenders on licence. What the policy change means for risk management, public protection, and probation supervision.
Read ArticleProfessional polygraph services for solicitors and barristers. Clear guidance on private instruction, legal limits, ethical safeguards, and UK criminal trial inadmissibility.
Read ArticleDr Keith Ashcroft explains why AI “hallucinations” are better understood as confabulations, and why this distinction matters for forensic, legal, cyber, and professional decision-making.
Read ArticleThe nocebo effect shows how negative expectations can produce genuine physical symptoms. Dr Keith Ashcroft explores the implications for investigative interviews, forensic assessment, and psychophysiological detection of deception.
Read ArticleDr Keith Ashcroft reviews the science behind detecting deception in investigative interviews, including common myths, research-supported techniques, and their implications for professional practice.
Read ArticleA clear, professional explanation of the American Polygraph Association (APA) Standards of Practice, and why they matter for examiners, clients, solicitors and commissioners of polygraph services.
Read ArticleDr Keith Ashcroft explains Preliminary Process Theory (PPT) and how it provides a modern, multi-process account of the physiological responses measured in polygraph examinations.
Read ArticleReference
A plain-English reference covering polygraph examinations, credibility assessment, scoring methods, question design, and UK risk-management terminology.