(1) Many people know the terms polygraph and lie detector test, but many are not familiar with how this test actually works.
(2) The test uses a process that analyzes the physiological reactions in a person’s body while he or she answers questions.
(3) First, a device called a pneumograph is attached to a person’s chest to record breathing patterns.
(4) Any abnormalities in respiratory patterns are recorded during an official interview.
(5) Next, a machine similar to those used in doctors’ offices is attached to the person’s upper arm to measure blood pressure.
(6) During this part of the polygraph test, the pulse and changes in blood pressure and heartbeat are recorded.
(7) Finally, skin responses are used as part of the lie detection examination.
(8) Usually, the tips of a person’s fingers are attached to electrodes.
(9) An abnormal amount of sweating is an indicator that the person may be lying.
(10) After the preceding steps have been followed, polygraph experts analyze the results.
(11) From the data, the experts may conclude that the person is telling the truth, or they may decide that the person is most likely lying.How many steps are in the process? (Do not include minor supporting details in your answer.)
A. three
B. five
C. one
D. two
E. six
F. four