Here is a link to a video interview with the McCanns I would like you to note the following...
Methods for lie detection and recognition of truth telling.
By studying verbal and non verbal patterns it is possible to discern lies with an 80% success rate. In order to do this you need to be aware of certain mental processes that go on during lying. Derren Brown the mentalist/hypnotist/magician uses these principles in his stage show and they draw from a number of sources to give fairly accurate results...
The Three process to bear in mind are
Nr 1 Emotional processes
Nr 2 Content complexity processes
Nr 3 Controlling processes
Emotional processes refers to the emotions which can leak out during deception. the most common emotions experienced by a liar are GUILT, FEAR and EXCITEMENT.
Content Complexity processes come from the fact that lying can be cognitively quite an involved task: for example it may become more and more difficult to maintain a convincing lie if you are questioned more and more on the same subject. Equally if you are taken by surprise it is often quite difficult to lie.
Controlling processes are those which we carry out to try to hide the signs we are telling a lie. In other words we try to behave NORMALLY and this act in itself gives away the lie as it involves unnatural or incongruent behavior which can be spotted.
In order to discern these traits it is important to have a base line for a persons behavior...in other words to have them in a situation where they will not feel inclined to lie and behave as they normally do....we are missing this in this case but I feel there are many clues in this interview.
These tiny movements (presuming that the person does not need glasses) seem to corelate to the amount of mental stress we are experiencing, the speed of our blink indicates the speed with which we are processing information. this is a sign of content complexity processes. In the interview it is obvious that the McCanns are blinking far in excess of what would be considered normal....Wiki, Blinking,http://en.wikipedia.org/wiki/Blinking
"Women and men do not differ in their rates of spontaneous blinking, averaging around 10 blinks per minute in a laboratory setting." It is not easy to get a read on this but by my reckoning both Kate and Gerry are blinking at approx 1 Blink per second which is a clear sign of complex mental processing and a good indicator of lie telling."
Hands and hand movement can often be a significant indicator....at one point near the start Kate says "if people know something if someone knows something" she then in the one and only time in the interview raises her own hand to touch her face. This is an instinctive reaction and goes back to school protocol the act of raising the hand to answer a question and also she touches her own face indicating to me that it is Kate that knows something she is not telling.
Feet and Legs:
People often give away their feelings with body position...These two have obviously received extensive media training but the cracks in the plaster are still visible I'm afraid. Kate spends most of the interview with her feet crossed inwards to form a point...this is the same as crossing your legs when you feel uncomfortable and is generally a sign of deceit in a situation like this...
I'm being Honest:
Worried that they may not be believed, liars often overcompensate by qualifying the lie with an unnecessary "Honestly....or you won't believe this but" and so on. In the interview Kate was asked the following question
" do you think you will be cleared of any involvement in Madeleine's disappearance"
Kates response should have been. "Yes I do....we were in no way involved"
What she said was:
"You know we know the truth, I know i'm innocent, Gerry knows he's innocent, we know each other are innocent and that to me was actually quite calming as i thought we're innocent, totally innocent and we know that and"
"she doth protest too much"At this point she was going to keep going but Gerry squeezes her hand and takes over by changing the subject.....
Kate is blinking at a massively increased rate but that is not all that gives her away as a liar...By using the principles of NLP or Neuro Linguistic Programing we can discern that Kate is lieing practically everytime she opens her mouth. It is a cliche but looking down and to the left is a sure fire indicator of lying in an average right handed person. Count for yourself how many times she looks down and to her left before giving her answer.
Gerry on the other hand has decided to go with Blinking like a man possessed and staring blankly ahead. This act of staring blankly ahead is also a sure fire indicator of lieing when combined with the increased blink rate....Gerry is trying as hard as he can in this piece to be poker faced but the simple fact is, it is unnatural behavior when under questioning to stare unless a concerted effort is being made to deceive the interviewer....
This is not a fool proof system but I am no fool....I think they were both lieing through their teeth but Kate was honest about one thing. She does know the TRUTH she just didnt tell us.
Get well soon Derren. (He had a nasty car crash)