Resolve disputes in Cardiff with the UK's most accurate brainwave lie detection technology.
Searching for 'lie detector test near me' in Cardiff? Our advanced P300 lie detector test offers a superior alternative to the polygraph. Our mobile examiners can attend your home or a neutral venue, utilizing an 8-channel EEG headset to record brain activity and verify statements with high scientific reliability.
We understand this can't always wait. That's why we offer same-day and next-day appointments across Cardiff and surrounding areas.
Call before noon and we can often attend Cardiff the same day. Same-day bookings are £599. Results the same evening.
Book today, tested tomorrow. Standard P300 lie detector tests in Cardiff from £499 with next-day availability 7 days a week.
Call 0161 524 5513 or book online 24/7. Tell us your preferred Cardiff location and we'll confirm within the hour.
Instead of relying on sweating, blood pressure or breathing like a polygraph, P300 EEG testing looks directly at how the brain reacts to information it recognises.
When you see or hear something meaningful, your brain produces a characteristic “P300” wave. During the test we mix neutral and relevant details while our EEG system tracks this response in real time.
If someone in Cardiff claims not to know certain facts but their brain reacts strongly to those exact details, that can indicate concealed knowledge or deception. This provides a more objective basis for assessing truthfulness.
Sensors sit gently on the scalp – there are no needles or pain. The person being tested simply sits comfortably while we run a carefully structured set of sequences and record the data.
We provide P300 response based lie detector test for individuals, couples, families, employers and legal professionals across Cardiff.
Modern, research‑based lie detector test that looks at brain activity rather than just physical stress signals.
We can attend homes, offices or neutral venues throughout Cardiff, bringing the full EEG lie detector test to you.
For time‑critical situations, we hold back emergency slots that can be deployed quickly in Cardiff.
Our P300 EEG lie detector service is used by people who need clear, objective information to cut through conflict and uncertainty.
If you are dealing with accusations, infidelity concerns or long‑running arguments in Cardiff, a structured test can provide clarity and help you decide what to do next.
We regularly assist families in Cardiff with disagreements around money, property, behaviour or sensitive incidents, providing an impartial data point everyone can refer to with our private service.
Businesses, HR departments, investigators and solicitors in Cardiff use our lie detector test for findings as one part of a wider fact‑finding process.
From first contact to your full written results — here's exactly what happens.
Secure your slot online or call 0161 524 5513. Same-day and next-day appointments are available in Cardiff. We confirm your booking within the hour.
Before the appointment, we work with you to prepare 3–5 precise yes/no questions. These are crafted to produce a clear P300 brain response and sent to you for approval in advance.
We travel to your preferred location — your home, a local hotel such as a Premier Inn or Holiday Inn, a business park meeting room, or any private space in the Cardiff area.
When we arrive, we briefly review the agreed questions with you and fit the BrainBit EEG headset. Calibration takes around 10 minutes to establish accurate baseline brainwave readings.
You sit quietly while questions and stimulus words appear on a laptop screen. You respond Yes or No. The EEG headset captures your P300 brain response at millisecond precision — completely involuntary and impossible to fake.
Results are analysed immediately on-site. You receive a verbal summary before we leave, followed by a full written PDF report emailed to you the same day — typically within 2–3 hours of the test ending.
We provide fully mobile P300 EEG testing, meaning we can attend homes, offices or neutral venues across Cardiff with the same accuracy as our fixed centres.
Central testing locations with good transport links for clients travelling from across the local area.
We cover surrounding districts, suburbs and villages, with options for either venue‑based or mobile visits depending on your needs.
Where suitable, our portable equipment can be set up at homes, offices or other quiet, private spaces across Cardiff.
We come to you. Choose the location that suits you best — fully discreet.
We can set up in any quiet room. Our equipment is compact, professional and discreet. No neighbours will know why we're there.
We regularly meet clients at Premier Inn, Holiday Inn and ibis hotels near Cardiff. A meeting room or standard room works perfectly. We can assist you with booking if needed.
For corporate clients in Cardiff, we can attend your office or a serviced meeting room on a local business park. Fully professional, fully private.
Based in the North West, we cover the entire United Kingdom. From Cardiff to London, Scotland, Wales and everywhere in between — travel fees apply outside the region.
Here is how we compare the two approaches. Read more about each test below, or see the full comparison here.
Measures brain recognition responses to key information, rather than just physical signs of stress or anxiety. This makes our P300-based lie detector service far more resistant to counter-measures.
Monitors sweating, blood pressure and breathing – all of which can be influenced by nerves, fear or simple counter‑measures. This is why many clients now prefer a modern lie detector service based on brain responses.
This is why Cardiff clients choose P300 brainwave testing over a traditional polygraph. One produces a clean, unmistakable scientific signal. The other produces noise.
Clean spike at 300ms — recognition confirmed. Involuntary. Cannot be faked.
✓ One clear, measurable response. Scientific. Objective. 90–95% accurate.
Chaotic stress signals — sweat, heart rate, breathing. Anxiety looks identical to deception.
✗ Noisy, subjective, ~60% accurate. Innocent people fail. Guilty people pass.
The P300 spike is a neurological fact — not an interpretation. When the brain recognises information it shouldn't know, it fires. Every time. No amount of nerves, medication or counter-measure training can stop it. That is why clients in Cardiff are choosing P300 EEG over the polygraph.
Peer-reviewed research accuracy rates for each method. The difference is not subtle.
Accuracy figures based on published peer-reviewed research. P300 EEG data sourced from Farwell & Donchin (1991), Rosenfeld et al., and subsequent independent replication studies.
The science is clear — P300 brainwave testing is in a different league to the traditional polygraph.
The P300 response is an involuntary brainwave fired when the brain recognises something it already knows. You cannot suppress it. You cannot fake it. Peer-reviewed studies consistently report accuracy between 90% and 95% — making it the most reliable method available to private clients in Cardiff.
The polygraph measures sweat, heart rate and breathing — all of which are heavily influenced by anxiety, nerves, medication and deliberate counter-measures. Independent research puts polygraph accuracy as low as 60%, meaning roughly 4 in 10 results may be wrong. It is not admissible in UK courts for this reason.
Why does P300 accuracy hold up? Because it measures memory recognition in the brain — not how nervous you feel. A guilty person's brain fires a characteristic 300-millisecond response when it encounters information only they would recognise. An innocent person's brain simply doesn't. Anxiety, medication and nerves cannot change this response.
Why Cardiff residents are switching from old-fashioned polygraphs to brainwave analysis.
| Feature | P300 Brain Test (Us) | Polygraph | Voice Stress |
|---|---|---|---|
| What it measures | Brain recognition (Memory) | Sweat & Heart Rate (Stress) | Micro-tremors |
| Accuracy | ~95% (Research grade) | 65-75% | Unreliable |
| Affected by Anxiety? | No (Involuntary response) | Yes (High false positives) | Yes |
| Can it be beaten? | Extremely Difficult | Yes (Countermeasures) | Yes |
See the clear difference between traditional polygraph testing — with multiple sensors, straps, and stress — and the simplicity of modern P300 EEG lie detection , using only a lightweight brainwave headband.
We know that calling a lie detector company is a sensitive step. We operate under strict data protection protocols to ensure your business stays yours.
Booking a lie detector test in Cardiff is a big decision. We combine advanced P300 EEG technology with experienced examiners to give you clear, defensible results.
We regularly handle relationship, family, workplace and legal disputes in Cardiff. Our examiners are trained to manage high‑emotion situations calmly and professionally.
Our team have conducted hundreds of lie detector tests across the UK and in the Cardiff region. Procedures are based on peer‑reviewed P300 research and standardised protocols.
We explain the process in plain English and never pressure anyone into testing. Every Cardiff appointment includes a full pre‑test interview and the right to stop the test at any time.
People book lie detector tests in Cardiff for many reasons. Our role is not to judge, but to provide clear, objective data so you can make informed decisions.
If trust has broken down, a P300 lie detector test can help confirm fidelity or uncover deception. We work with couples who want closure, evidence and a way to move forward—together or apart.
Employers and small businesses in Cardiff use our tests when money, stock or data has gone missing. We can test one person or a small group, and provide clear written reports for HR or internal investigations.
Being falsely accused can be devastating. Many clients in Cardiff use our P300 lie detector test to show friends, family or employers that they are telling the truth, backed by independent scientific evidence.
While no lie detector test is a replacement for a court, some solicitors and legal teams in Cardiff use P300 brainwave reports as part of a wider case strategy. We can liaise with your legal representative if required.
A lie detector test is a serious step. We will always be honest about what P300 EEG can and cannot do so that clients in Cardiff make an informed choice.
P300 EEG testing in Cardiff is highly accurate, but not a magic lie‑proof machine. It is one powerful piece of evidence that should sit alongside common sense, other facts and, where relevant, legal advice.
We provide mobile lie detector testing across Cardiff and the wider Cardiff area. If you live just outside Cardiff, we can usually still come to you.
Our examiners regularly travel to surrounding locations near Cardiff. When you book, just tell us exactly where you are based and we will confirm availability and any travel time needed.
Many clients in Cardiff prefer to be tested at home. Others choose a neutral location such as a hotel meeting room or business centre. We will help you choose the most discreet and practical option.
We also operate in nearby areas such as [link to one or two related area pages if available], using the same P300 EEG technology and pricing structure.
Our Cardiff lie detector service is built on established neuroscience, not guesswork. The P300 response has been studied for decades in laboratories and forensic settings.
The P300 is a measurable brainwave that appears around 300 milliseconds after a person recognises meaningful information. During testing, we show or read a mixture of neutral and case‑relevant items while the EEG headset measures these responses.
Unlike changes in heart rate or sweating, the P300 response is generated in the cortex – the memory and decision‑making areas of the brain. It is extremely difficult to consciously suppress or fake this response, which is why research shows up to 95% accuracy.
Our protocols are based on peer‑reviewed “guilty knowledge” and “concealed information” test designs used internationally. We are transparent about limitations and always advise Cardiff clients to see results as strong evidence, not an automatic court verdict.
Every test includes a detailed 12-page PDF report analyzing neural responses. This is the exact report you will get – you can also see your results explained here. Swipe through example pages below to see the depth of our forensic data.
Granular breakdown of deception scores calculated from specific neural biomarkers.
Clear, definitive results indicating deception probability and overall risk assessment.
Signed certification of examination suitable for legal or private verification purposes.
Full transparency with access to the raw visual data used to generate the final conclusion.
Millisecond-by-millisecond timeline of brain activity in response to probe stimuli.
Comparative analysis of responses to relevant, irrelevant, and control questions.
Analysis of response latency indicating increased cognitive load during deceptive answers.
Scientific validation of P300 wave amplitude and latency specific to the subject.
We understand that booking a lie detector test in Cardiff is extremely personal. Your privacy, dignity and data security are our priority at every stage.
Whether you are the person booking or the person being tested in Cardiff, you will be treated with respect. We do not take sides; our role is to gather accurate scientific data and explain what it shows.
Our mobile P300 EEG units cover all of Cardiff and beyond, serving the entire Cardiff region.
A snapshot of how individuals, families and organisations in Cardiff describe their experience with our deception detection service. Scroll sideways to browse more reviews.
“The P300 EEG screening helped us resolve an internal fraud case in
under a week. The test process was clear, discreet and the report
was strong enough for our legal team to act on.”
— James H., Business Owner (Cardiff)
“After months of doubt, the P300 test finally gave us clarity.
The examiner in Cardiff was calm, non‑judgemental and explained
every step so we knew exactly what the results meant.”
— Sarah M., Private Client (Cardiff)
“We now use P300 EEG for senior hiring and sensitive roles.
It’s become a core part of our risk management, giving us far more
confidence than traditional vetting alone.”
— Mark T., HR Director (Cardiff)
“The team brought the equipment to our office in Cardiff,
set everything up quickly and kept disruption to a minimum.
Professional from start to finish with clear, factual outcomes.”
— Corporate Client (Cardiff)
“P300 testing gave our family neutral evidence we could all accept.
It didn’t solve every disagreement overnight, but it removed the
doubt around what actually happened.”
— Family Client (Cardiff)
"I had been suspicious for over a year. The P300 test gave me a definitive answer within the same day. The examiner was compassionate and professional throughout."
— Private Client (Cardiff)
"Stock had been going missing for months. P300 screening identified the source quickly. The certified report gave us everything we needed to proceed legally."
— Retail Manager (Cardiff)
"We were both tested on the same day. Both results came back clear. It sounds strange to say, but that report saved our relationship. We finally had proof to move forward."
— Couple, Private Clients (Cardiff)
"My business partner denied diverting client payments. The P300 result was unambiguous. We resolved the dispute within days of receiving the report."
— Business Owner (Cardiff)
"I was nervous about the process but the examiner put me at ease immediately. The whole session was under two hours and the report was with me the same evening."
— Individual Client (Cardiff)
"Following allegations against a staff member, we needed an objective assessment fast. The P300 team were with us within 48 hours and handled the situation with complete discretion."
— Care Home Manager (Cardiff)
"Used for a sensitive identity check as part of a legal matter. The process was explained clearly and the documentation provided was detailed and professional."
— Solicitor's Client (Cardiff)
"I called on a Tuesday morning and was tested that afternoon. The team were incredibly responsive and the urgency of my situation was taken seriously from the first call."
— Private Client (Cardiff)
"Our insurer recommended P300 EEG as part of a complex fraud investigation. The scientific rigour of the report was exactly what was needed at the tribunal stage."
— Legal Representative (Cardiff)
"I was falsely accused at work. The P300 result clearly showed No Deception Indicated. My employer accepted the report and the case was closed. I cannot thank the team enough."
— Employee, Private Client (Cardiff)
"The examiner travelled to our Cardiff premises, set up with minimal disruption and completed three assessments in a single morning. Highly recommended for corporate clients."
— Operations Director (Cardiff)
"My solicitor suggested P300 testing as supporting evidence in a custody matter. The report was thorough, clearly written and accepted without challenge by the opposing party."
— Private Client (Cardiff)
"From the first enquiry to receiving the report, every interaction was handled with complete confidentiality. The Cardiff team understood the sensitivity of our case perfectly."
— Family Client (Cardiff)
"We had unverified allegations of substance use affecting performance. P300 testing provided objective data without relying on hearsay. The process was fair and transparent for all parties."
— HR Manager (Cardiff)
"The written report arrived within four hours of the test. It was clear, well-structured and my legal team said it was one of the most professionally presented expert documents they had seen."
— Private Client (Cardiff)
"We have now used DeceptionDetection on four separate occasions across our Cardiff sites. The consistency in quality and process gives us complete confidence every time."
— Group Security Manager (Cardiff)
"A competitor appeared to be using our proprietary information. P300 screening of two key personnel quickly identified the source. The test saved us months of internal investigation."
— Tech Company Director (Cardiff)
"I had never done anything like this before and was very anxious. The examiner spent time explaining the science before we began. By the end I felt completely at ease with the process."
— Individual Client (Cardiff)
"My solicitor referred me to DeceptionDetection as part of building my case. The report format was exactly what was required and the examiner was available to answer follow-up questions from my legal team."
— Legal Client (Cardiff)
"My partner didn't believe me regardless of what I said. I requested the test myself to prove my honesty. The No Deception Indicated result changed everything between us."
— Private Client (Cardiff)
"Following a safeguarding concern involving a staff member, the governing body recommended independent P300 assessment. The process was handled sensitively and the outcome was clear."
— School Governor (Cardiff)
"I couldn't take time off work so I asked about a weekend slot. The team accommodated a Saturday morning appointment in Cardiff without any issue. Very flexible service."
— Private Client (Cardiff)
"Cash had been disappearing from the till over several weeks. After P300 screening of three staff members, the source was identified. The whole process cost far less than a private investigator would have."
— Small Business Owner (Cardiff)
"I needed to know the truth for my own peace of mind as much as anything else. The test gave me a definitive answer and I was able to stop second-guessing and move forward with my life."
— Private Client (Cardiff)
"A tenant denied causing significant damage to my property. P300 testing provided clear evidence that contradicted their account. The report was accepted by the small claims court without challenge."
— Landlord (Cardiff)
"I'm a sceptic by nature and came in with a lot of questions. The examiner explained the neuroscience behind P300 in plain English and showed me the raw data from my own test. Converted."
— Private Client (Cardiff)
"A sensitive matter involving access to patient records required a discreet, professional solution. The P300 team handled our Cardiff practice case with the highest level of confidentiality."
— Practice Manager (Cardiff)
"The £499 fixed fee seemed like a lot before the test. After receiving a clear result that ended two years of uncertainty, it was the best money I have ever spent."
— Private Client (Cardiff)
"Booked online at 11pm, had a confirmation call by 9am and was tested by lunchtime. The whole experience from booking to report was seamless."
— Individual Client (Cardiff)
"My PI recommended P300 EEG as the next step after their initial surveillance work. The two reports together built an extremely strong case. I would use both services again."
— Private Client (Cardiff)
"A manager was accused of persistent bullying. P300 testing provided objective evidence that supported the investigation findings. HR were impressed by the scientific rigour of the report."
— HR Director (Cardiff)
"My solicitor recommended P300 testing as supporting documentation for our immigration application. The certified report was professionally presented and accepted without question."
— Private Client (Cardiff)
"The examiner arrived at our Cardiff office at 9am and had completed three individual assessments by midday. Minimal disruption to the working day and a full report by close of business."
— Operations Manager (Cardiff)
"We received an anonymous tip that one of our directors was sharing confidential client data. P300 screening cleared the accused and redirected our investigation appropriately."
— Company Secretary (Cardiff)
"My son was accused of stealing from a classmate's family. As a parent I needed to know the truth. The examiner adapted the session appropriately and the result gave our family clarity."
— Parent, Private Client (Cardiff)
"Guest valuables had gone missing from two separate rooms. P300 screening of housekeeping staff resolved the investigation discreetly without involving police at that stage."
— Hotel General Manager (Cardiff)
"I was concerned about the physical side of the test. There are no needles, no uncomfortable sensors and no stress. Just a headset and a calm, professional examiner. Far easier than I expected."
— Private Client (Cardiff)
"Working with a support charity in Cardiff, P300 testing provided independent corroboration in a very difficult case. The examiner showed real sensitivity and professionalism throughout."
— Support Worker (Cardiff)
"A sibling alleged that a will had been altered after our parent's death. P300 testing provided critical evidence around knowledge of specific document details that only the forger would hold."
— Family Client (Cardiff)
"We suspected a driver was involved in cargo diversion. P300 testing confirmed our suspicions and the certified report supported our insurance claim and disciplinary process."
— Logistics Director (Cardiff)
"Before signing a pre-nuptial agreement, both parties agreed to voluntary P300 testing on financial declarations. It gave both families complete confidence in the process."
— Private Client (Cardiff)
"The P300 report was submitted as expert evidence at an employment tribunal. The opposing counsel did not challenge its validity and the tribunal referenced it positively in their findings."
— Employment Solicitor (Cardiff)
"I used DeceptionDetection twice over 18 months as my situation evolved. Both times the service in Cardiff was consistent, professional and the results were delivered with complete clarity."
— Private Client (Cardiff)
"A regulatory compliance issue required us to verify staff knowledge of a specific incident. P300 testing gave us a scientifically robust answer that satisfied both internal audit and our regulator."
— Compliance Officer (Cardiff)
"The examiner noticed I was distressed before we began and took time to check in with me properly before proceeding. That level of care made the whole experience far less daunting."
— Private Client (Cardiff)
"I had previously taken a polygraph elsewhere and felt the result was unreliable. The P300 EEG test in Cardiff was a completely different experience — far more scientific and far more convincing."
— Private Client (Cardiff)
"High-value tools and materials were disappearing from our Cardiff site. After screening four workers, the culprit was identified. We avoided a lengthy police investigation and recovered the losses."
— Site Manager (Cardiff)
"I spent months convinced my partner was lying. The P300 result showed no deception. I had to accept I was wrong. It was humbling but it saved my marriage. I am grateful we took the test."
— Private Client (Cardiff)
"Client funds had been misappropriated. P300 testing of two senior staff members produced clear Deception Indicated results on both. The report formed the centrepiece of our subsequent legal action."
— Senior Partner (Cardiff)
"I was on the verge of ending a ten-year relationship based on suspicion alone. The test result was clear. My partner was telling the truth. Booking that appointment was the best decision I ever made."
— Private Client (Cardiff)
Swipe or use the arrows to view more client reviews.
Watch how our brain-wave lie detector technology achieves 95% accuracy. Professional deception detection across the UK.
Answers to the most common questions we receive about lie detector testing in Cardiff.
Our Cardiff pricing structure is straightforward: £499 for standard service and £599 for priority service. We accept all major payment methods to secure your booking.
Clients in Cardiff receive results they can trust. Our system's 95% accuracy rate is derived from algorithmic analysis of brainwaves, ensuring zero human error in the scoring process.
For critical disputes in Cardiff, we offer an express service. While standard appointments are booked in advance, our emergency £599 slots are designed for immediate deployment.
Our standard package in Cardiff covers a single specific subject area with 3–5 distinct questions. This is the industry standard for forensic-level lie detection.
Our online booking system for Cardiff is open 24/7. Select your preferred date, pay the deposit securely, and receiving your confirmation email instantly.
Finding a location in Cardiff is easy. Once you book, we will provide a list of available venues or arrange a time to visit your address.
Yes — we come to you. We regularly conduct tests at clients' homes, local hotels (Premier Inn, Holiday Inn, ibis), business parks and private offices across Cardiff and the surrounding area. Just let us know your preferred location when booking.
Yes. Same-day appointments in Cardiff are available if you call before noon — these are £599. Next-day appointments are available 7 days a week from £499. Call 0161 524 5513 or book online and we'll confirm within the hour.
Before your appointment we work with you to prepare 3–5 precise yes/no questions tailored to your situation. These are sent to you for approval before the test day. When we arrive in Cardiff we review and confirm them with you, then begin EEG calibration. Nothing is sprung on either party.
Once your Cardiff test is complete, we normally need no more than half an hour to process the data and finalise the written report. It is then emailed directly to you.
If you are ready to move forward, we can usually offer appointments in Cardiff within the next 24–48 hours, and often sooner for urgent cases.