Question

question /
0.25 points
one problem with the use of the polygraph for lie detection is that
a polygraph assessments are more expensive than brain scans.
b anxiety, irritation, and guilt feelings all prompt similar physiological reactivity, and there
is no clear pattern of physiological reactions for lying.
c emotions involve expressive behaviors as well as autonomic nervous system arousal.
d innocent people are presumed to be guilty at the very beginning of any lie detector
test.

Explanation:

A polygraph measures physiological responses like heart rate, blood pressure, etc. Anxiety, irritation, and guilt (and even lying) can all cause similar physiological arousal. So, it's hard to distinguish if the physiological changes are due to lying specifically. Option A is incorrect as cost is not the main problem. Option C is a general statement about emotions and not a problem with polygraph for lie - detection. Option D is not a valid general statement about polygraph tests.

Answer:

B. anxiety, irritation, and guilt feelings all prompt similar physiological reactivity, and there is no clear pattern of physiological reactions for lying.