▶ Your Answer :
In the reading, the author asserts that a new
brain scan lie detector measures neural activity more accurately. However, the
professor in the lecture provides several reasons as a rebuttal to the author’s
point.
To begin with, the professor asserts that the
brain scan lie detector cannot identify true statements perfectly. The device
also holds information from the same part of brain, which a conventional detector
used to capture. Thus, when a subject is embarrassed, it is likely to be
interpreted as lie. This counters the reading’s point that the new detector does
not make mistakes as this type of indicator is not affected by a subject’s
level of anxiety.
In addition, the professor claims that the result
of new device is still be interpreted subjectively. People has minor differences
on brain functions. Also, there are no standard criteria for judging lies. Therefore,
people still need experts to analyze the results of tests. This casts doubt the
author’s assertion that the brain scan lie detector can provide objective results.
Finally, the lecturer argues that brain
scans are also vulnerable to intentional tricks. It is proven that complex mental
activities are recognized as lies. Also, practiced lies can make fool the
scanning device. This challenges the reading’s claim that the new device makes
it much more difficult for a subject to trick the test. |