The Dunning-Kruger Effect: Why Incompetent People Think They're Experts

The Dunning-Kruger Effect: Why Incompetent People Think They're Experts

Author: Moms and Mysteries Podcast March 26, 2026 Duration: 49:32
Have you ever met someone who was terrible at something but thought they were a genius? This week, we explore the Dunning-Kruger effect, a cognitive bias where people with low ability at a task overestimate their own competence. We start with the case that inspired the research: McArthur Wheeler, a man who robbed two banks after covering his face in lemon juice, believing it would make him invisible to security cameras. His baffling confidence led psychologists David Dunning and Justin Kruger to study this strange phenomenon. We then look at how this bias plays out in the world of true crime, from the comically inept “Hillbilly Heist” orchestrated by the Loomis Fargo crew, to the chilling case of Caleb Flynn, a former American Idol contestant accused of murdering his wife and staging a break-in. We also examine the tragic story of Lauren Giddings and the law student who thought he could commit the perfect murder, only to have his plan unravel on live television. Finally, we share the incredible story of Brett Johnson, a cybercriminal who went from the Secret Service's Most Wanted list to a respected FBI consultant, demonstrating the rare journey from the “peak of Mount Stupid” to true self-awareness. Thank you to this week's sponsors: See why more than 3 million families have chosen K12 – find a K12 Powered School near you today! Go to K12.com/MOMS to learn more. Right now, go to Quince.com/moms for free shipping and 365-day returns. That's a full year to wear it and love it. Now available in Canada, too. New episodes every Tuesday and Thursday! Follow us on Instagram: @momsandmysteries Join our Patreon: patreon.com/momsandmysteriespodcast Visit our website: momsandmysteries.com Learn more about your ad choices. Visit megaphone.fm/adchoices

Between school drop-offs and grocery runs, Mandy and Melissa found a shared obsession with the unanswered questions lurking in the shadows. Moms and Mysteries: A True Crime Podcast is the result: a conversation that feels like sitting at a kitchen table with two friends who are deeply curious about the human condition. Their perspective is uniquely grounded, examining each story not just for its shock value, but for the societal threads and personal tragedies that weave it together. You’ll hear them discuss everything from the strangely specific weirdness of a Florida crime to a globally known cold case, always with a blend of empathy and a dash of necessary, dark humor. This isn't a clinical report; it's a twice-weekly deep dive fueled by a lifelong fascination with mysteries, both big and small. The tone is warm, the research is thorough, and the conversation is the kind you get hooked on. New episodes of this true crime podcast arrive every Tuesday and Thursday, ready to be your companion during a commute or while folding laundry. They’ve been asking "how did this happen?" since they were kids, and now they’re pulling up a chair for you to join that ongoing, compelling discussion.
Author: Language: en-us Episodes: 100

Moms and Mysteries: A True Crime Podcast
Podcast Episodes
Project X: The Birthday Party That Caused a Riot [not-audio_url] [/not-audio_url]

Duration: 59:57
In 2012, a 16-year-old girl in a quiet Dutch town made a simple mistake: she accidentally set her Facebook birthday party invitation to “public.” Within days, the invite went viral, attracting tens of thousands of RSVPs…
The Roofman: The Wild Story of Jeffrey Manchester [not-audio_url] [/not-audio_url]

Duration: 42:12
In 1998, a polite and oddly courteous criminal known as "Roofman" began a crime spree across nine states, targeting mostly McDonald's restaurants. Jeffrey Manchester, a former Army paratrooper, would cut holes in the roo…
Nicole Sanchez: A Sister's Fight for Justice [not-audio_url] [/not-audio_url]

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In September 1999, 17-year-old Nicole Sanchez was a talented singer with a contagious laugh and big dreams of becoming a veterinary assistant. But her life was brutally cut short by her 23-year-old boyfriend, Lionel Vill…
Kelsey Berreth: The Thanksgiving Murder Plot [not-audio_url] [/not-audio_url]

Duration: 44:48
On Thanksgiving Day 2018, 29-year-old mother Kelsey Berreth vanished from her Woodland Park, Colorado home, leaving behind her 1-year-old daughter and a batch of unbaked cinnamon rolls. The last trace of her was a bizarr…
When Pranks Turn Deadly [not-audio_url] [/not-audio_url]

Duration: 44:39
Imagine hearing sirens outside your home, stepping onto your porch, and being shot by police—all because of a prank call from a thousand miles away. This is exactly what happened to Andrew Finch in Wichita, Kansas, in a…
Daniel Brophy: "How to Murder Your Husband" [not-audio_url] [/not-audio_url]

Duration: 48:10
Daniel Brophy was a beloved chef and culinary instructor at the Oregon Culinary Institute in Portland. At 63 years old, he was passionate about teaching and loved by his students. On June 2, 2018, Daniel was found shot t…
Nikki Cheng: Husband Charged with Murder [not-audio_url] [/not-audio_url]

Duration: 48:02
When Nikki Cheng Saelee McCain vanished in May 2024, her family was devastated. Nikki was born in a refugee camp in Southeast Asia and came to the United States with her family, settling in Seattle. She was a beautiful,…
Jane Mixer: The Controversial Conviction [not-audio_url] [/not-audio_url]

Duration: 39:23
In 1969, Jane Louise Mixer, a 23-year-old law student at the University of Michigan, was trying to catch a ride home to tell her parents she was engaged to her boyfriend Phil. Jane was an exceptional student—top 10% of h…
[Unsolved] Cheryl Coker: The Kroger Parking Lot [not-audio_url] [/not-audio_url]

Duration: 35:28
On an ordinary Tuesday morning in October 2018, Cheryl Coker vanished from her suburban Ohio home. Her SUV was found abandoned in a Kroger parking lot with her purse and phone still inside. Cheryl—a bubbly, talkative mom…
A Deadly Inheritance: The Von Stein Murder [not-audio_url] [/not-audio_url]

Duration: 42:14
In July 1988, Lieth Von Stein was brutally murdered in his Washington, North Carolina home while his wife Bonnie barely survived the attack. The crime scene looked like a burglary gone wrong—but investigators quickly rea…