Lie Detector Test in Manchester
X Three Surveillance Ltd
Polygraph Experts in Manchester

How does a lie detector work?
A lie detector, also called a polygraph machine, reveals when deception is being used.
They are currently utilised by professionals but a new lie detector which incorporates visual activity in addition to physiological clues is being trialled.
In the past polygraph machines were analogue with little needles which illustrated the physiological responses on a scroll of paper. Today, digital technology is not only professional and accurate it employs algorithms and computer screens. A lie detector test can seldom be beaten.
At X Three Surveillance Ltd. we are trained in the skills of administering and analysing lie detector tests. Whether you’ve seen them on the television, used in a criminal investigation or read about them, almost everyone is familiar with their name.
Some media reports have claimed that within ten years lie detector tests will be widely adopted in everyday situations like job interviews.
Perhaps you’re sceptical or believe that auto suggestion makes people respond guiltily. Maybe you feel that the test is easy to misread and that the results of a lie detector test can’t be trusted.
The team at X Three Surveillance know there is a viable scientific base to lie detector tests and that the technology used is configured to evaluate when all is not as it should be.
The most important point is that it’s the body that’s doing the talking and not the mouth during lie detector tests. In many cases the bodily responses contradict words.
Usually four-six sensors are attached to the subject of the test.
These sensors are to highlight any involuntary bodily responses. Whilst under stress and actively deceiving someone physiological responses will manifest regardless of how well the subject tries to verbally enforce a lie.
The sensors monitor:
Heart rate and blood pressure -These are normally measured on the upper arm. The data uses transducers to transform in to electronic signals for the lie detector.
Perspiration – Also called electro-dermal activity or galvanic skin response. Sensors are attached to fingertips and fingers, the most porous areas of the body. Humans perspire more when lying and sweating fingers conduct electricity more effectively than dry fingers. Lie detector evidence of conductivity and moisture is compelling.
Respiration. – This uses pipes around the chest and abdomen, two pneumographs which convert the amount of displaced air in to electronic signals.
Arm and leg movements may also be assessed and an involuntary twitch or fidgeting is a great source of information.
The polygraph machine records data from the sensors around the body and constructs a graph which tells the lie detector test official whether lies are being told.
Every physiological alteration will be transmitted and reflected on the graph.
Prior to the actual test pre test questions are used for a baseline reading.
The examiner profiles the subject.
The test is carried out.
The lie detector test readings are expertly analysed.
A conclusion is reached via the physiological data and profiling.
Lie detector tests with X Three Surveillance Ltd. uncover deceit, rebuild trust and resolve issues.
What happens during a lie detector test?
There’s a high probability that anyone taking a lie detector test will feel guilty even if they are innocent, this is human nature. The lie detector test process is not a ten minute one, it can take well over an hour before the actual test begins but no time is wasted.
The subject of the test will be attached to a polygraph (lie detector) machine via sensors, wires and tubes. These will record any physiological changes in the subject during the entire lie detector test process.
Digital technology, algorithms and electronic signals are core to the success and accuracy of a lie detector test.
The heart rate, blood pressure, perspiration and other involuntary responses are monitored meticulously. During a lie detector test the subject can concentrate on their words without realising that their body is telling a story very much to the contrary.
The lie detector test process:
- Prior to the lie detector test itself the examiner will normally have a chat with the subject and learn about them and the situation that has brought them this point.
- During this stage the examiner profiles the subject. This is a vital tool for understanding how the subject reacts during responses, how they digest information and their tell tale signs and habits.
- Questions are devised which suit the individual situation and these are checked with the subject.
- The actual test. Approximately ten questions are asked in the test but only three to five of these will be analysed. The others are control questions and won’t be suitable for a yes/no response, also known as closed questioning. If the subject tries to reply with just a yes or no then this can speak volumes about their deliberate need or wish not to expand on something. For example, X Three Surveillance Ltd’s team may ask if you like living in Manchester and why.
- Using the core questions the data from the lie detector test is read. Physiological information which shows significant changes often signals deception. Any questions which were asked a few times may have been asked to assure the examiner of the same reaction when under pressure and deceiving.
- The examiner has been trained to perform these tests so the questions, profiling and analysis will be accurate. The “verdict” will be delivered professionally.
The skilled and qualified lie detector test examiners at X Three Surveillance Ltd. don’t treat the test as if it is part of a TV show in which there are pauses for effect or drawn out conclusions. We’re not playing with people’s lives for fun; we’re aiming for accuracy, compassion, empathy and aptitude.
X Three Surveillance Ltd’s experts don’t make a horrible situation last for one moment longer than it has to and although a lie detector test can be gruelling it can also bring relief, resolution and a firm base from which to move forward.
Lie detector tests have a positive impact because suspicions can be replaced by certainties.
Can you outwit X Three’s lie detector experts Manchester team?
Guilty people try to ensure an innocent reading when they take a lie detector test with us.
X Three’s lie detector experts Manchester team have seen almost every trick in the book, some are more convincing than others, a few defy belief and others unwittingly tell us all, which is obviously the reverse of the client’s intention!
Whilst we aren’t going to betray all of our trained and qualified lie detector experts Manchester team secrets (we’re not daft) we will tell you the commonly employed techniques which subjects use to try to steer us off course.
This information is given so that should you be inclined to cheat you save yourself a lot of time and effort. We’re lie detector experts Manchester and further afield. We know what we’re looking for, what you don’t realise you’re telling us and how to kid a kidder!
X Three’s lie detector experts Manchester operatives have known clients who’ve tried to confuse us, here’s how:
- Deliberately answered yes or no to every question.
- Denied the relevance of any event, person or situation.
- Joked with our lie detector experts Manchester.
- Hesitated before answering all questions.
- Aimed to control their breathing to 15-30 breaths per minute.
- Controlled or altered their breath during control questions, sometimes by thinking of something frightening or upsetting.
- Offered peculiar or “clever” answers to our lie detector experts Manchester e.g. Q: What day of the week is it? A: Same as this time last week.
- Practiced their responses repeatedly pre test.
- Ignored the polygraph results from our lie detector experts Manchester even when these are significantly active.
- Pre test day subjects often study lie detector tests, X Three’s lie detector experts Manchester, common questioning techniques and the types of questions asked.
- Act like a novice when they’re an expert on lie detector tests and machines –and “know” how to outwit us.
- Behave like a friend. We’re professional lie detector test experts Manchester operatives. We are polite and affable but we don’t actually want to be your new best friend!
Our lie detector experts Manchester team don’t recommend any of the following techniques:
- Tacks placed in the shoe. Ouch. Some use a tack to provide a visible response after every question so the results are consistent but they’re intended to confuse our lie detector experts Manchester team.
- Hyper activity, fidgeting, purposeful twitching. e.g. frequent wriggling or cheek biting.
- Sedatives have been used to throw results in to disarray.
- Deodorant has been deployed on areas of the body including fingertips so that sweat is less prevalent during deception.
Medications should be disclosed to X Three’s lie detector test experts Manchester team so that the test can be taken with this knowledge. Sometimes the subject is deemed ineligible for testing because medication conflicts with the technology and physiology.
Our lie detector experts Manchester team look forward to more cunning tricks and schemes and outwitting fibbers.