scientific methods of detecting deception

• INTOXICATION


  The method uses intoxicating beverages to bring out the mental state of stupefaction or excitement, speech and emotion are less strained due to the lowering of inhibitions and so the subject may reveal the truth
• HYPNOSIS


  A special psychological state with certain physiological attributes, resembling sleep only superficially and marked by a functioning of the individual at a level of awareness other than the ordinary conscious state
• WORD ASSOCIATION TEST


  Systematic study of associative thoughts can reveal information about an individual's personality, character and areas of emotional disturbances. It is based on a theory that one word or idea is reflective of another word or idea and the expression of their association forms a meaningful picture
• TRUTH-SERUM TEST


  A psychoactive medication used to obtain information from subjects who are unable or unwilling to provide it otherwise
• PSYCHOLOGICAL STRESS EVALUATOR


  Detects "guilt-revealing," laryngeal micro-tremors which exist in the voice and are associated with stress and lying
• COMPUTER VOICE STRESS ANALYZER

  It is based on the hypothesis that there are infrasonic components of human voice not audible to observers caused by a physiological phenomenon present in muscles called "microtremor"
• NEURO-LINGUISTIC PROGRAMMING


  This method has made the claim that by watching a person's eye movements, an interviewer can determine if a person is remembering a past event (true recall, as in a valid alibi) or constructing an event (as in a false event that never occurred, i.e., a false alibi)
• BRAIN-WAVE FINGERPRINTING


  Uses brain-reading techniques to determine whether specific information is stored in a subject's brain; it does this by measuring electrical brainwave responses to words, phrases, or pictures that are presented on a computer screen
• MICRO-EXPRESSION


  Can provide cues or leakage that reveals the true feeling of the subject and can be used to
• POLYGRAPHY


  Records graphically the physiological responses of the subject (respiration, sweating, blood pressure and pulse rate)