CPE Testing Procedures 1 — Questions and Answers
Question 1: Which physiological responses are typically monitored during a polygraph test?
- Muscle tension and skin temperature
- Heart rate, blood pressure, and respiration (Correct answer)
- Brain activity and pupil dilation
- Body temperature and eye movement
Correct answer: Heart rate, blood pressure, and respiration
A polygraph instrument is designed to detect and record specific physiological changes that may occur when a person is under stress or attempting deception. The core physiological responses monitored are changes in heart rate, blood pressure (cardiovascular activity), and respiration patterns. These are the primary indicators that polygraph examiners analyze to assess responses to questions.
Question 2: What is the primary purpose of the "control" questions in a polygraph test?
- To compare against relevant questions and establish baseline readings (Correct answer)
- To intimidate the subject into telling the truth
- To ask questions that have no emotional significance
- To distract the subject from the real questions
Correct answer: To compare against relevant questions and establish baseline readings
Control questions in a polygraph test are designed to elicit a moderate physiological response from the subject, typically about a probable lie or a general wrongdoing. These responses serve as a baseline for comparison against the physiological reactions to 'relevant' questions (those directly related to the issue under investigation). This comparison helps the examiner assess the significance of the subject's responses to critical questions.
Question 3: How does a polygraph examiner determine if a person is being deceptive?
- By comparing answers with the answers given by other individuals
- By analyzing changes in physiological responses to relevant questions (Correct answer)
- By asking the subject to sign a confession
- By using psychological methods such as hypnosis
Correct answer: By analyzing changes in physiological responses to relevant questions
Polygraph examiners determine deception by monitoring a subject's physiological responses, such as heart rate, blood pressure, respiration, and skin conductivity. Significant changes in these responses when answering relevant questions, compared to control questions, are interpreted as indicators of stress or an attempt to conceal information. These physiological shifts are believed to correlate with deceptive behavior.
Question 4: What type of questions are typically asked during a polygraph test?
- Hypothetical questions
- Open-ended questions
- Relevant questions related to the matter being investigated (Correct answer)
- Yes or no questions unrelated to the investigation
Correct answer: Relevant questions related to the matter being investigated
During a polygraph test, examiners primarily ask relevant questions that directly pertain to the specific facts or incident under investigation. These questions are crucial for assessing deception, as the subject's physiological responses to them are compared against responses to irrelevant or control questions. This comparison helps the examiner identify patterns indicative of truthfulness or deception regarding the core matter.
Question 5: What is the purpose of a "stim test" or "stimulus test" in polygraph testing?
- To determine the subject’s emotional response to irrelevant questions
- To assess how a subject reacts to stress under controlled conditions before the actual test (Correct answer)
- To check the accuracy of the polygraph machine
- To give the subject a chance to practice before the test begins
Correct answer: To assess how a subject reacts to stress under controlled conditions before the actual test
A 'stim test' or 'stimulus test' is conducted before the actual polygraph examination to demonstrate to the subject that the machine works and can detect physiological changes. It helps calibrate the subject's baseline responses and shows them that their reactions, even to known lies, are recorded. This process aims to increase the subject's fear of detection, making the subsequent actual test more effective in eliciting truthful responses.
CPE Testing Procedures 1
Which physiological responses are typically monitored during a polygraph test?