Questions must be as simple and as short as possible
Questions must be answerable by Yes or No
Questions must notbeaccusatorial
Questions' meaning must be clear and phrased in a language that the subject can easily understand
Questions must never contain inference which presupposes knowledge on the part of the subject
IrrelevantQuestions:
Questions that have nobearing to the case under investigation
Questions may refer to the subject'sage, educationalattainment, maritalstatus, citizenship, occupation, etc.
Examiners ask these types of questions to ascertain the subject's normalpattern of response by eliminating the feeling of apprehension
Examples: Did you eat today? Do you smoke? Are you from Baguio?
Relevant Questions:
Questions pertaining to the issue under investigation
Questions must be unambiguous, unequivocal, and understandable to the subject
Questions must all be related to one issue or one criminal act
Relevant questions must be very specific to obtain an accurate result
Further classified into Strong Relevant and Secondary or Weak Relevant
Knowledge Questions:
Questions designed to prove whether the subject possesses information regarding the identity of the offender or location of evidence or facts of the case under investigation
Examples: Do you know who stole the watch of Hazel? Do you know who killed Justine?
Evidence-Connecting Questions:
Designed to stimulate the guilty subject and focus his attention on the probability of incriminating proof that would tend to establish his guilt
Examiner must secure information from the investigator on the availability of evidences collected from the crimescene
Examples: Were the found footprints outside of Hazel's house yours? Were the knife found on the place where Justine was found dead yours?
Control Questions/Comparison Questions:
Compare the physiological response to relevant questions about the crime with the response to questions relating to possiblepriormisdeeds
Designed to produce a response in the innocent subject
Primary Control Questions are based on a known lie
Secondary Control Questions are more specified in nature and based upon another set of wrong doings
Guilt-Complex Questions:
Specialized control question designed to safeguard against mistaking relevant questions response and is based on a fictitious crime under investigation
Examiner must be certain that the fictitious crime was never actually committed
Details of the question must be specific enough that the guilty subject can be sure he did not commit this particular offense
Examples: Did you steal the gold coin of Juan? Did you kill Anna?
Symptomatic Questions:
Designed to detect and evaluate the presence of outside issues, which may suppose responses to relevant questions
Example: Do you understand that I'm not going to ask any trick or surprise questions?
Sacrifice or DYAT Question:
Intended to obtain responses usually produced by the introduction of the first relevant question in the sequence
Divulge the subject's norm plus and excitement stage
Example: DO YOU INTEND TO ANSWER TRUTHFULLY?
K-Y Question:
Three questions grouped together by Backster and used only on the third chart in the zone comparison test
Designed to confirm the previous charts and detect indirect involvement or guilty knowledge
S stands for suspect, K stands for know, Y stands for you
CardNumberTest (CNT):
Done with the use of 7 cards numbered accordingly (except 7, 11, and 13)
Purpose: To determine if the card selected by the subject is shown/asked
Silent Answer Test (SAT):
Contains the same questions from GQT, CNT, SRT, and MQT
Subject is instructed to think of his/her answer without saying it, process is called "Sub Vocalization"
Purpose: To serve as an affirmative check
Peak of Tension Test:
Used if subject is not informed of the vital facts of the offense