Although newspapers reported that a murder victim had been stabbed with a knife, two police investigators knew that the actual murder weapon was a letter openor. While carefully monitoring the changes in heart and perspiration level of a prime suspect, the investigators asked him if he typically used a letter opener on his mail. The investigators were making use of the:
Correct answer: B. Guilty knowledge test
- A. Relative deprivation principle.
- B. Guilty knowledge test
- C. Adaptation-level phenomenon
- D. Two-factor theoryTake Psychology Courses
Explanation
The guilty knowledge test presents details known only to investigators and the perpetrator, then looks for autonomic reactions to recognition of those details. It is therefore a specific form of polygraph-based deception testing.
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