They did this on BBAU, and they lied about how accurate it is then as well. Voice Analysis is actually only 47% accurate, not 90%

Its a stupid shitdetector they only showed who they favor brian i hate big brother and especially making gerry look like a prick.

Its not even 47% accurate more like what the people think it is or to spice thigns up and of course Brian got everything rite they wan him to win, my sister studies psychology and it doesnt work like that ... they made it look even more fake by giving the answers straight away.

:thumbs:

Source?

The housemates didn't seem to be connected up to anything... like their fingertips for example.

Of course that wasn't a real lie detector, it was just some endemol employed monkey pressing the "TRUTH" button or the "LIE" button depending on how the producers wanted the housemates to be perceived in terms of truthfulness.

And Brian did know who Shakespeare was before entering the House... what a load of crap.

Im just suprised that all the HM belived it, well i did expect them because most of them are thick like the twins didnt even know what superior is now come on ....

Freddy...

"The American Polygraph Association's website lists conclusions from multiple university-grade studies into the accuracy of voice stress analysis as a means of detecting the subject's truthfulness. All cast doubt on the validity of the results of such tests; many describe the results as no better than chance."

(taken from wiki article on voice stress analysis)

I will have to try and find I direct link to this website.

A BB Aussie fan site. They did a story on it last year. I cant get a link. You can download Voice Anslysis to your computar yourself, its a free software.

Well I gave up! But the information is out there if you want it enough.

I agree that it is nothing more than chance when going on just voice alone. There are too many biases.

I think it was done to cause drama and thats it. I don't believe for one second that it was acurate in any way. Liams questions seemed to be harder than anyone elses too which I thought was unfair. I hope this doesn't effect how he acts around the twins because they all have fun together.

It doesn't need to be done with a polygraph. I would assume the screen was just for show.

I expect the psychologists prepared a set of questions which they had near enough definite answers to, from weeks of studying footage, then just waited for the "yes" or "no" responses to see if they matched with the answers they already had.

Also, I thought Big Brother contestants had heart rate monitors on already? Or was that a different series?

Then again, it could have just been a bit of a wind up.

Nonsense. Jealousy doesn't just concern people who fancy each other.

the_chosen_one...

What do you mean? They had no attachments to them on the show I watched!

It does need to be done with a polygraph in order to be accurate. Speech is not accurate at all.

It doesn't matter if it was prepared or not. Their answers can't have been prepared so the psychologists wouldn't know if they were lying or not in such a short timeframe.

I don't care how good a psychologist you claim to be, you can't tell if someone is lying from speech alone and give a verdict in just a few seconds.

Read back and you'll realise we had this discussion earlier.

There was a series where the contestants had heart monitors on all day, everyday. I was just pondering if that facility was still in use.

It is, to an extent, to the ear of an expert, but it's not something I'd rely on. Certainly not in this situation.

Of course it does. If 'Big Brother' already knew the answers to the questions they'd prepared, all they had to look out for was if the housemates told the truth (this is concerning particular questions such as "Liam are you jealous" etc... The psychologists already knew Liam was jealous because they'd been studying his behaviour and they gave their opinions on "On The Couch" last Sunday. Admittedly, they're only opinions, but I'm sure they got a few expert second opinions, too, before blurting it out on telly).

I don't quite recall the claim you're referring to...:wink:

I did read it, and I didn't agree with some of it.

They could plan it and still not be able to give an answer that quickly. How do they 'know' liam is jealous for example? This is just an assumption they have made based on body language cues, which I have said are not always that accurate, especially considering the highly artificial environment.

They might think Liam is jealous but they can't simply say he is lying based on their observations. Peoples behaviours change over time and only a polygraph is able to tell with a good degree of accuracy, whether or not they are lying at that particular time.

If you read back you would see that we looked up how accurate speech was and many experts have found it to be no more accurate than chance would dictate.

I agree, to an extent, but considering how much time and footage the psychologists have had to look at over the past few weeks, I can trust them to come up with some fairly decent reasoning for why they think Liam is jealous of the Brian and Amanda situation. Equally as accurate as what a polygraph machine could do in a few seconds.

The way they presented it was fake, which is what I was saying all along really. To make it look like they could give a definite answer, using ‘lie detection’ as some cheap form of credibility, when really it was probably a bunch of psychologists behind the scenes having what would be probably best described as a ‘good guess’.

Now all the people take it as gospel because of the lie detection angle, which is false. A proper test may have been accurate but not those awful psychologists they use on the coach show.

Also, I am weary of brians results and him not knowing Shakespeare because I believe he would know Shakespeare. Cynical maybe but I am thinking, perhaps BB are buttering him up as a rival to the twins since the twins made favourite to win with all the bookies.

Anyway, it's so late...

I'm in full agreement that the show they put on in the diary room (e.g. a heart-rate monitor on the screen) was just that. A show. It's the part about Big Brother making the results up which I didn't agree with, in parts.

I also agree that all this talk about 'lie-detection' and such is alot of guesswork, but it's important to remember, even polygraph machines can be cheated/beaten. In fact, if I was a betting man, I'd put money on it that Tracey could beat a polygraph machine, judging by her composure and apparent ability to maintain her heart-rate.

As for the Brian 'Shakespeare' question, I agree this particular one they put in to try and shut a few people up (fans doubting Brian's sincerity), and we are still no more aware of the real truth on the subject than we were beforehand, so I'd say you were partly right that some answers were made up.

The Big Brother team will employ very good psychologists, I'm sure, and although they come in for alot of stick on this forum, I'm inclined to regard their opinions with some credibility, on these matters, but I'm also aware that all the Big Brother shows (BBLB, BBOTC, BBBM) use and highlight opinions which suit their plans and causes.

They did this in Big Brother Australia last year (it was called Under the Radar, it used a voice polygraph to measure whether someone was lying, the results were used to figure out who was nominated, if I remember correctly) and it was a disaster. It was later confirmed that it only worked correctly 45% of the time.

Yeah, it's extremely inaccurate, but isn't this thread meant to be about whether it was fake not whether it was inaccurate. Hence the title?

I must agree with you on this one, I think the heart rate tv thing was just a graphical alternative to big brother just saying "that was a lie" or "that was true" I don't think they ever implyed that it was a polyograph(sp) test or that it was as accurate. Plus I myself have cheated a polyograph test! I went to some science museum once and they had one there and they asked people if they wanted to try it out and my mum asked me "have you ever lied to me?" and the answer is obviously actually yes, and I said "no" and because I didn't care whether she knew I was lieing or not (as long as she didn't know what I had lied about), I was calm enough to fool it. I think the 99.98% statistic (if that's what it is) is a bit too over-estimated for polyograph tests, I'd say it was about 60% accurate, 70% if your get nervous about the question.

It's couch lol.

They 'know' by his voice, body language and the fact that he listened on their conversations in the diary room. To be honest, I think your expecting a bit much, I'd never in a million years expect BB to put in a pollyograph test, for 1 that would require the housemate make contact with the outside world, short of making holes in the diary room wall. I think they judged the accuracy on a number of things, i.e. body language, voice, reaction time, their knowledge of him from asking him questions in the DR, psychologists etc combining the accuracy of each one to get a reasonable and level of accuracy. I'm not saying it's extremely accurate, but it'll do for a stupid little test as part of a task.

I don't see the experts from the russell group (the top 20 uk universities, including the worlds oldest 2, oxford and cambridge) coming down to endemol to test a bunch of dim-witted celeb wannabes for a commercial broadcast do you :pat:?
It's couch lol. bb on the couch. Just so you know.

of cousre it was fake where were the wires etc its only to stir up trouble:mad::mad::mad:

In the french series, we have this lie detector, but apparently it's better than the UK one because we have a banner with green if it's true and it comes to orange if it's in the middle and red if you lie.