Professional Polygraph Question Formulation
Clarity, Precision and Fairness Before Testing Begins
Polygraph question formulation is a central part of the examination process. At the Centre for Forensic Neuroscience, questions are developed with care so they are direct, precise, interpretable, and clearly understood before testing begins.
Why Polygraph Question Formulation Matters
Question formulation is not an administrative step. It is a professional process that defines the exact issue being examined and ensures the examinee understands what will be asked during the polygraph examination. Every question is reviewed with the examinee to confirm understanding before testing begins.
- check_circlePolygraph questions are reviewed before testing begins.
- check_circleThere are no surprise questions during the examination.
- check_circleQuestions should normally be answerable with “yes” or “no”.
- check_circleThe examinee must understand exactly what each question means.
- check_circleThe wording should be neutral and should not assume guilt.
- check_circleThe question should focus on the identified issue, not vague or broad allegations.
Direct, Precise and Interpretable Polygraph Questions
Every polygraph question should be constructed so that its meaning is clear to both the examiner and the examinee. Questions that contain ambiguity, double meanings, or hidden assumptions can undermine the reliability of the examination.
Clear wording also reduces unnecessary cognitive load. During testing, the examinee should not have to work out what a question means, resolve vague terms, or interpret complex phrasing before answering.
- edit_noteQuestions should have one clear meaning.
- edit_noteQuestions should be easy to understand when spoken aloud.
- edit_noteQuestions should avoid double meanings, hidden assumptions, and confusing sentence structures.
- edit_noteQuestions should not combine several issues in one sentence.
- edit_noteQuestions should not invite explanation, argument, or interpretation during the test.
- edit_noteIf a term could mean different things to different people, it should be defined or replaced.
- edit_noteThe examiner should be able to explain why the question was asked.
- edit_noteThe examinee should be able to explain what the question means before testing begins.
- edit_noteThe issue should be testable as a clear behavioural question, not framed as a broad judgement, legal charge, or abstract concern.
Behavioural Wording in Polygraph Questions
Behavioural wording is usually preferred in polygraph question formulation because it asks about something the person did or did not do. A well-selected polygraph target issue should involve a specific behavioural act that the examinee can clearly recognise as something they did or did not engage in.
- psychologyQuestions should usually describe behaviour rather than conclusions or labels.
- psychologyBehavioural wording helps reduce ambiguity.
- psychologyBehavioural wording helps distinguish what happened from why it happened.
- psychologyQuestions may focus on specific actions — for example: sent, took, accessed, viewed, deleted, touched, entered, removed, or shared.
- psychologyBroad labels — such as fraud, abuse, misconduct, betrayal, or dishonesty — should be avoided unless clearly defined.
- psychologyA stronger question identifies the specific act being tested.
- psychologyThe wording should allow the examinee to answer from memory of conduct, not moral judgement or legal interpretation.
- psychologyQuestions should avoid making ‘truthfulness’ the subject of the question where the behaviour itself can be asked about directly.
Mental-State Wording
Words about intent or mental state require particular care in polygraph question formulation. While sometimes relevant, they can make a question harder to answer and harder to interpret.
- warningWords such as intend, knowingly, deliberately, purposefully, recklessly, wanted, or meant to can introduce interpretation.
- warningMental-state wording may sometimes be relevant, but it can make a question harder to answer and harder to interpret.
- warningWhere possible, mental-state issues should be translated into behavioural terms.
- warningIf a mental-state term is necessary, it should be discussed and clearly understood before testing.
- warningThe question should not require the examinee to speculate about unconscious motives.
- warningThe question should not ask the examinee to explain why something happened.
- warningIf intent is central to the referral issue, the examiner should consider whether the issue is suitable for polygraph testing or whether it should be reframed.
- warningQuestions about motivation, excuse, rationalisation, or psychological inference should normally be avoided unless they can be translated into clear behaviour.
Use of Prefixes and Qualifying Phrases
Relevant polygraph questions may use a qualifying prefix where necessary. Phrases such as “Apart from what you have already told me…” or “Other than what has already been discussed…” help separate admitted or agreed matters from the remaining issue being tested.
- short_textRelevant questions may use a qualifying prefix where necessary.
- short_textThese phrases help separate admitted, explained, or agreed matters from the remaining issue being tested.
- short_textQualifying phrases should normally be placed at the beginning of the question.
- short_textThe qualifier should be simple and easy to understand.
- short_textThe qualifier should not make the question unnecessarily long or unclear.
- short_textThe examiner should confirm that the examinee understands both the qualifying phrase and the main question.
- short_textImportant admissions, exclusions, definitions, or limitations should be recorded in the examination notes or report.
Scoping Polygraph Questions by Date, Event and Context
Every relevant polygraph question should have a clear scope. Scope may be defined by date, location, event, person, allegation, or context. Clear scoping ensures the examinee knows exactly what period or event is included and what is excluded.
- calendar_monthEvery relevant question should have a clear scope.
- calendar_monthScope may be defined by date, date range, location, event, person, item, allegation, conduct, or context.
- calendar_monthDates should be used where they help identify the event being tested.
- calendar_monthA date range may be appropriate where the exact date is uncertain but the relevant period is clear.
- calendar_monthThe date range should be narrow enough to avoid ambiguity but broad enough to reflect the facts accurately.
- calendar_monthWhere the exact date is uncertain, the question may refer to an agreed event rather than forcing an artificial date.
- calendar_monthThe examinee should know exactly what period of time is included and what is excluded.
- calendar_monthWhere repeated behaviour is alleged, the examiner should decide whether the question concerns one event, a pattern of conduct, or conduct within a specific period.
Use of Names, Roles and Identifying Details
Names and identifying details may be used in polygraph questions where they improve clarity. The choice between a full name, initials, a role, or an agreed description depends on the circumstances of each case.
- personNames may be used where they improve clarity.
- personA name may be necessary to identify a complainant, client, colleague, family member, witness, victim, or other relevant person.
- personWhere a full name is unnecessary, a role, initials, or agreed description may be used — for example “the client”, “the complainant”, or “your partner”.
- personA name may be clearer where there is a risk of confusing one person with another.
- personA role may be clearer where the examinee knows the person primarily by role.
- personThe examiner should confirm that the examinee understands exactly who is being referred to.
- personIdentifying details should not be added merely for emphasis.
- personThe wording should protect privacy where possible without sacrificing clarity.
Relevant, Comparison and Neutral Polygraph Questions
A polygraph examination typically involves different types of questions, each serving a specific purpose within the test format. All question types require careful formulation.
- fact_checkRelevant questions address the identified issue being examined.
- fact_checkComparison questions, where used, must also be carefully formulated, reviewed, and understood.
- fact_checkNeutral or irrelevant questions may be used within recognised testing formats.
- fact_checkAll question types should be appropriate to the test format being used.
- fact_checkQuestions should not be humiliating, discriminatory, or unnecessarily intrusive.
- fact_checkThe examiner should avoid improvising questions without a clear professional reason.
Recognition-Based and Concealed-Information Questions
Some polygraph test formats may involve recognition of specific information. These formats require particular care in wording and item selection to maintain the integrity of the examination.
- searchSome polygraph test formats may involve recognition of specific information.
- searchThese formats require particular care in wording and item selection.
- searchAny key detail used in such a format must be accurate.
- searchThe key detail should not be known to an innocent examinee.
- searchAlternative items should be plausible but incorrect.
- searchThe examiner should avoid revealing key information during earlier questioning.
Common Problems in Polygraph Question Formulation
Poorly formulated questions can create uncertainty before, during, or after the examination. A question may be problematic if it is too broad, too complex, legally loaded, emotionally phrased, or unclear about the behaviour being tested.
- reportQuestions that refer to legal charges, counts, or allegations rather than specific behaviour.
- reportQuestions that ask whether the examinee was “truthful” rather than asking about what they did or did not do.
- reportQuestions that combine several behaviours into one sentence.
- reportQuestions that rely on vague labels such as fraud, abuse, misconduct, betrayal, or dishonesty without defining the behaviour.
- reportQuestions that ask about intent, motive, or psychological state when observable behaviour would be clearer.
- reportQuestions that are noticeably longer, shorter, or more complex than other questions in the test format.
- reportQuestions that invite explanation rather than a clear “yes” or “no” answer.
Examples of Clearer Polygraph Question Wording
The aim is to move away from broad, legal, or abstract wording and towards direct behavioural questions that can be clearly understood and answered.
Less Clear
“Did you breach company confidentiality?”
Clearer
“Did you send the client document to anyone outside the company?”
Less Clear
“Did you deliberately mislead your employer?”
Clearer
“Did you tell your employer that you had attended the appointment when you had not?”
Why This Matters
Careful polygraph question formulation directly supports the quality and fairness of the examination. It benefits examinees, referring professionals, and the integrity of the process.
Reduces Ambiguity
Clear questions produce interpretable results that can be relied upon with confidence.
Protects Fairness
Neutral wording ensures the examination does not assume guilt or bias the outcome.
Supports Understanding
The examinee understands the process, reducing avoidable distress and supporting informed consent.
Professional Interpretation
Well-formulated questions support clearer scoring and more defensible professional conclusions.
Focused Examination
Ensures the examination addresses the identified issue and does not stray into unrelated territory.
Transparency
Improves transparency for clients, solicitors, employers, and referring professionals.
Discuss Whether a Polygraph Examination Is Suitable
If you are considering a polygraph examination, the first step is a confidential consultation to clarify the issue, assess suitability, and discuss how questions may be appropriately scoped.