Although Newspapers Reported That a Murder Victim Had Been Stabbed

Multiple Choice

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 opener. While carefully monitoring the changes in heart rate 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

A) adaptation-level phenomenon.
B) relative deprivation principle.
C) guilty knowledge test.
D) catharsis hypothesis.