Amit Katwala

looking at like dormitory thefts at the University of Berkeley. So that was the first case of the polygraph. There was a women's only dorm in Berkeley and a bunch of stuff had gone missing like jewelry and cash and books and things like that. And this was the first case where the Berkeley police department were kind of called in to run polygraph tests on all these young women.

looking at like dormitory thefts at the University of Berkeley. So that was the first case of the polygraph. There was a women's only dorm in Berkeley and a bunch of stuff had gone missing like jewelry and cash and books and things like that. And this was the first case where the Berkeley police department were kind of called in to run polygraph tests on all these young women.

To try and find out who did it. And so John Larson went along with the machine and he ran tests on all these women, including the woman whose stuff had been stolen to begin with. And, you know, eventually he came across a woman who blew up when the machine was connected to her, refused to answer any more questions. And he kind of thought, well, she's the one who did it.

To try and find out who did it. And so John Larson went along with the machine and he ran tests on all these women, including the woman whose stuff had been stolen to begin with. And, you know, eventually he came across a woman who blew up when the machine was connected to her, refused to answer any more questions. And he kind of thought, well, she's the one who did it.

To try and find out who did it. And so John Larson went along with the machine and he ran tests on all these women, including the woman whose stuff had been stolen to begin with. And, you know, eventually he came across a woman who blew up when the machine was connected to her, refused to answer any more questions. And he kind of thought, well, she's the one who did it.

The most recent estimates I have suggest that there are about 3 million lie detector tests a year in the United States. It's used much more heavily in some countries than others. So the US is a very, very heavy user of the polygraph. Japan is another one. So, yes, it was used and it is used. It's still used by government departments, you know, intelligence agencies and things like that.

The most recent estimates I have suggest that there are about 3 million lie detector tests a year in the United States. It's used much more heavily in some countries than others. So the US is a very, very heavy user of the polygraph. Japan is another one. So, yes, it was used and it is used. It's still used by government departments, you know, intelligence agencies and things like that.

The most recent estimates I have suggest that there are about 3 million lie detector tests a year in the United States. It's used much more heavily in some countries than others. So the US is a very, very heavy user of the polygraph. Japan is another one. So, yes, it was used and it is used. It's still used by government departments, you know, intelligence agencies and things like that.

But it's also used by police departments where they want to get a confession from someone. without necessarily having to take a case to trial. It's a much cheaper way of extracting a confession from someone if you think they're guilty than having to go through this sort of expense and process of actually taking them to trial. So it is still used quite widely.

But it's also used by police departments where they want to get a confession from someone. without necessarily having to take a case to trial. It's a much cheaper way of extracting a confession from someone if you think they're guilty than having to go through this sort of expense and process of actually taking them to trial. So it is still used quite widely.

But it's also used by police departments where they want to get a confession from someone. without necessarily having to take a case to trial. It's a much cheaper way of extracting a confession from someone if you think they're guilty than having to go through this sort of expense and process of actually taking them to trial. So it is still used quite widely.

And you see this in kind of true crime documentaries all the time where the polygraph invariably pops up at some point in the investigation. Its heyday was really in the kind of 20s, 30s, 40s and 50s, I think. So after Larson did these tests on women in college dorms, then they quickly started testing suspected murderers.

And you see this in kind of true crime documentaries all the time where the polygraph invariably pops up at some point in the investigation. Its heyday was really in the kind of 20s, 30s, 40s and 50s, I think. So after Larson did these tests on women in college dorms, then they quickly started testing suspected murderers.

And you see this in kind of true crime documentaries all the time where the polygraph invariably pops up at some point in the investigation. Its heyday was really in the kind of 20s, 30s, 40s and 50s, I think. So after Larson did these tests on women in college dorms, then they quickly started testing suspected murderers.

And then it kind of snowballed from there with the help of a guy called Leonard Keeler, who was a high school student who really helped to popularize the machine.

And then it kind of snowballed from there with the help of a guy called Leonard Keeler, who was a high school student who really helped to popularize the machine.

And then it kind of snowballed from there with the help of a guy called Leonard Keeler, who was a high school student who really helped to popularize the machine.

Yeah, so the estimates range from as high as 85 to 90 percent to as low as 60 to 65 percent. So it's not much better than tossing a coin. And studies show that actually, as individuals, we can get it. We can tell when someone's lying about 54 percent of the time. So it's only slightly better than just human intuition.

Yeah, so the estimates range from as high as 85 to 90 percent to as low as 60 to 65 percent. So it's not much better than tossing a coin. And studies show that actually, as individuals, we can get it. We can tell when someone's lying about 54 percent of the time. So it's only slightly better than just human intuition.

Yeah, so the estimates range from as high as 85 to 90 percent to as low as 60 to 65 percent. So it's not much better than tossing a coin. And studies show that actually, as individuals, we can get it. We can tell when someone's lying about 54 percent of the time. So it's only slightly better than just human intuition.