Sana Khadar
speaker
2,999 appearances
51 recordings
5 series
first heard Feb 2020
last heard 14 Aug
Sana Khadar’s voice in public audio — every appearance, attributed to the second.
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Appearances
From ABC Radio National, this is All in the Mind.
I'm Sana Kadar.
Today, it's part four of our four-part series, Forensic, on the psychological tools police use to crack crimes and how they can sometimes fall short.
Okay, so if there aren't any solid behavioral ways of telling whether someone is lying or not, what about looking at brain activity?
This is an area that's long been of interest for researchers and law enforcement.
The idea that you could scan someone's brain and tell if they're lying or not.
But there's a core challenge when it comes to brainwaves and lie detections.
Arthur Lee is an assistant professor at Boston University in the United States, and he researches complex mental states and how you might decode them using neuroscientific methods.
A couple of years back, he and colleagues at the University of Berkeley turned to a puzzle that had plagued science for decades.
Because as Arthur says, there are now ways to detect whether someone is lying with some level of accuracy, at least better than chance, in lab experiments.
But those same tests do a very poor job discriminating deception from other emotions or states in the brain, like selfishness or nervousness.
That means you can get false positives.
And in the real world, that could translate to false convictions.
So the team set out to create a kind of foundational experiment, trying to get closer to what lying actually is.
And the experiment they ran to do that comes from the 2013 Martin Scorsese-directed, Leonardo DiCaprio-starring film, The Wolf of Wall Street.
Those weasels!
I should say, they were lying of their own volition.
Participants were not instructed to lie.
It's just that the conditions of the game incentivize people to lie sometimes.
Kind of sounds like a lot of real-world scenarios, but anyways.
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