The success rate
up to 90%
claimed for lie detectors is misleadingly attractive.
If we refer
a figure to a
company with 500 employees, twenty of
the lie detector could catch 18 of them, but in
so would place
32 innocent employees
problem for the management would therefore become
theft. It seems surprising that a
way of using lie detectors has not
This method consists in
the subject to
read aloud statements about the crime
Clearly, anyone who was not
of the true
facts would not
between saying: 'The thief was
a sports jacket'
and 'The thief was dressed
a blue suit'.
a person who
knew the true facts would be likely to register a
or not he
to disguise his
reaction, the method would ensure that an innocent
person could not be convicted in his place.