How Pete Blair scored 100% in a deception detection study

In a 2014 deception detection study, Pete Blair made 33 judgments—and got all 33 right. That paper was titled “Expertise in deception detection involves actively prompting diagnostic information rather than passive behavioral observation.” I ask Pete about what the factors were in him getting 100% accuracy in that study, and we talk about the interplay between verbal and nonverbal behavior. Pete talks about the importance of context and domain knowledge in making high-confidence judgments, and he discusses how such insights will sometimes be based on aspects that we aren’t consciously aware of.  Learn more about your ad choices. Visit megaphone.fm/adchoices

Zach Elwood, author of influential books on poker tells and host of the People Who Read People podcast, joins The Deductionist podcast for a wide-ranging conversation about what we can and can't learn from human behavior. Drawing on his years studying poker tells and consulting for high-stakes players, Zach explains why reading behavior in structured games like poker is fundamentally different from reading people in real-world situations like interrogations, negotiations, or everyday conversations. The discussion explores why nonverbal behaviors are almost always far less informative than what people say (and what they don’t say), why we can be drawn to overconfident behavior “experts" who promise certainty in uncertain situations, and how context and environment can dramatically change the meaning of behavior. We also discuss why some law enforcement professionals claim that understanding nonverbal behavior is hugely important in their work, while others claim it has close to zero impact. Sometimes, people are talking past each other, and thinking about entirely different aspects of behavior. Learn more about your ad choices. Visit megaphone.fm/adchoices

Polygraphs are a controversial tool in criminal investigations: critics argue they're too unreliable to trust, while proponents say that, even if they’re not perfect, they nonetheless can play a valuable role in helping uncover the truth. I talk with veteran polygraph examiner David Goldberg (executiveprotectiongrp.com), who has conducted more than 20,000 examinations over a 30-year career and who believes that, in the hands of a highly skilled examiner, polygraphs are far more accurate than most people realize. We discuss why he thinks innocent people should see nothing to fear when taking a polygraph, how experienced examiners distinguish deception from nervousness, how hiring processes use polygraphs, and why he sees interviewer skill—not the technology—as the biggest factor in accuracy. David talks about the granular details of how a polygraph examination is conducted, and the strategies he uses. Along the way, we explore the broader question that underlies so many debates about the polygraph and other uses of behavior analysis: when can information that's less than 100% reliable still be useful for making important decisions? Learn more about your ad choices. Visit megaphone.fm/adchoices

In real or fictional criminal interrogation scenes, you've probably seen the approach where police barge in and confront the suspect with the evidence, trying to get them to crack and give a confession. In this talk, Maria Hartwig and Christian Cory explain why that doesn’t work well, and why a strategic use of evidence (SUE) approach, involving planning out the reveal of evidence, gets much better results. Maria is a well known researcher and trainer of criminal interviewing, and Christian is a 26 year law enforcement veteran. I talk to them about their and others' attempts to promote more science-based approaches to interviewing and interrogation. They are Co-Directors at the Aletheia Project (project-aletheia.org), which brings together researchers and law enforcement practitioners to improve interview techniques. We talk about their view that "old school" interrogations are built around a misguided "confession obsession," why bad ideas and exaggerated claims about nonverbel behavior and lie detection are so persistent and popular, and the downsides of lying to suspects about evidence. We talk about what the science really says about micro-expressions, and we explore why people seem so drawn to false, exaggerated ideas about reading behavior. Learn more about your ad choices. Visit megaphone.fm/adchoices

Zack Davies was a standout contestant on the popular reality TV show The Traitors (UK, season 2). The Traitors is what is called a social deduction game, similar to the games Werewolf and Mafia. In this talk we examine psychological factors and behavioral clues that can shape players' perceptions and decisions in this game. We discuss how friendships and rivalries can negatively affect people’s judgment. We talk about behavioral clues; for example, why it is that unusually expressive, exuberant behavior is a clue that someone is a Faithful (i.e., a “good guy”). We talk about social deduction game strategy, deception, group psychology, unconscious bias, and how to make tough judgments when there’s little actual information or evidence to go on. Zack shares behind-the-scenes stories from the show, including the intense stress of life in the castle, and a panic attack that never made it on TV. Whether you're a fan of The Traitors or just interested in human behavior, you’ll probably find a lot to like in this episode. Learn more about your ad choices. Visit megaphone.fm/adchoices

Zack Davies was a standout contestant on the popular reality TV show The Traitors (UK, season 2). The Traitors is what is called a social deduction game, similar to the games Werewolf and Mafia. In this talk we examine psychological factors and behavioral clues that can shape players' perceptions and decisions in this game. We discuss how friendships and rivalries can negatively affect people’s judgment. We talk about behavioral clues; for example, why it is that unusually expressive, exuberant behavior is a clue that someone is a Faithful (i.e., a “good guy”). We talk about social deduction game strategy, deception, group psychology, unconscious bias, and how to make tough judgments when there’s little actual information or evidence to go on. Zack shares behind-the-scenes stories from the show, including the intense stress of life in the castle, and a panic attack that never made it on TV. Whether you're a fan of The Traitors or just interested in human behavior, you’ll probably find a lot to like in this episode. Learn more about your ad choices. Visit megaphone.fm/adchoices

How do digital/open-source investigators uncover hidden truths and expose lies? World-renowned digital sleuth Craig Silverman shares important lessons he's learned from years spent exposing scammers, fake-news operators, fraud networks, and online deception. We discuss: the techniques investigators use to track anonymous people through seemingly insignificant clues; why stepping away from a case can be more productive than obsessively chasing leads; and how confirmation bias can derail even experienced investigators. Craig recounts the story of how he identified the anonymous creator behind the influential fake-news site True Pundit, along with other investigations that uncovered sophisticated fraud schemes that made millions of dollars. We also explore the modern explosion of misinformation, fake credibility, and AI-generated deception, and why investigative skills are becoming an increasingly valuable skill—not just for journalists, but for anyone trying to make sense of today's confusing information landscape. Learn more about your ad choices. Visit megaphone.fm/adchoices

How much can we really learn from people's words and behavior—and where do we risk fooling ourselves? In this talk, former Secret Service agent and polygraph examiner Brad Beeler explores the practical realities of interrogations, deception detection, statement analysis, and reading people in high-stakes situations. We discuss why confirmation bias is such a threat to good investigations, why many popular body-language claims are overstated, and how investigators might make use of subtle behavioral clues without becoming wrongly overconfident in them. Brad shares stories from criminal investigations, explains how experienced interviewers think about truth and deception, and offers a polygraph examiner’s take on the controversial subject of polygraphs. We also talk about the importance of rapport-building and listening to what people are actually trying to communicate. Learn more about your ad choices. Visit megaphone.fm/adchoices

What if some job applicants aren’t actually trying to get jobs — but are instead trying to infiltrate companies? Dani Tepedjiyska, who works with the recruitment firm Michael Page, describes a strange and growing world of fake resumes, organized applicant networks, AI-assisted interviews, and suspicious staffing firms that may be helping fraudulent actors gain access to banks and other financial institutions. We talk about the real-world signs she’s seen while interviewing deceptive candidates — from people secretly receiving answers during interviews to applicants who suddenly crack under simple follow-up questions. We also explore how AI tools are making this kind of fraud much easier, why remote work creates new vulnerabilities, and how some infiltrators may be playing a very long game. Along the way, Dani shares practical insights for job seekers about how recruiters analyze applicant resumes and behavior, and tips on optimal LinkedIn strategies. Learn more about your ad choices. Visit megaphone.fm/adchoices

Many people think police interrogations often involve reading body language and catching “tells” of deception. Interrogation trainer Mark Anderson explains how much of what’s taught about using nonverbal behavior in high-stakes interviews is based on myth, not science—and how a faulty focus on “reading people” can actually damage interviews. We dig into why stress behaviors don’t signal guilt, how confirmation bias warps investigations, and why “reading people” is far less useful than most believe. Instead, Mark lays out what actually works: deep listening, better questioning, managing conversations, and building real rapport—even with people who’ve done serious harm. Along the way, he shares stories from his career that show how empathy and curiosity can unlock information in surprising ways. If you’re interested in psychology, communication, or the reality behind interrogations, this episode might challenge some of your basic assumptions. Learn more about your ad choices. Visit megaphone.fm/adchoices