hello Johnny
hi they um uh doctor take a seat the lie
detector or polygraph we’ve all seen the
movies some steely-eyed spy trying to
conceal the truth from a mysterious
interrogator but can you beat a lie
detector in real life lying is stressful
business the natural physiological
reactions to telling a big fat whopper
is that your pulse quickens you breathe
faster and you start to sweat polygraphs
work by detecting these changes so any
spike on the chart can indicate stress
and therefore the possibility of a lie
so the key to deceiving a lie detector
is to try and hide your real stress
levels 24 hours earlier I nicked
Richards games console
the question was could I hide my act of
dishonesty from the machine I was hooked
up to it so that my breathing skin
conductivity and blood pressure could be
measured polygraph tests start with the
examiner asking a series of basic
questions to which the answers are known
to be true this establishes a baseline
which indicates the average stress
levels of that individual
now one rumor technique used by Old
Spice was to put a drawing pin in their
shoe now I’m going to press my toes down
onto this pin during the baseline
questions hopefully the pain will
increase my stress levels so that during
the potentially incriminating questions
my nervous stress won’t register any
higher on the chart okay I’m going to
ask you a series of questions I just
need you to answer yes or no to each
question are you known as Johnny yes is
today Tuesday yes keep perfectly still
following which is quite difficult when
your big toes jammed down on a drawing
pin are you wearing a gray jacket yes
with the baseline questions over it was
time for the main interrogation to begin
I was also hoping another trick might
fool the Machine stress makes you sweat
more which increases your skin
conductivity putting telltale spikes on
the graph so earlier I’d sprayed my
fingers with antiperspirant to reduce
the flow
the tester started regarding the missing
games console do you intend to answer
truthfully each question about that yes
prior to age 25 did you ever steal
anything from a shop yes famously in the
late 80s CIA agent Aldrich Amos
beat two polygraph tests while he was
spying for the Russians by apparently
just being super relaxed have my
techniques worked with similar results
prior to 2005 have you ever taken
anything from a friend knowing you would
not return it no do you know where the
missing games console is right now No
did you take the missing games console
that we could be using no well Johnny it
would come at the end of your test and
I’m afraid to tell you that you actually
failed the test there’s one particular
question which was did you take the
missing games console from the bench in
the lab and it shows a significant
change in your breathing in your
galvanic sweat resistance and your blood
pressure you fail one question so you
fail the entire test I’d made a fatal
error
apparently the pain induced stress
caused by the drawing pin produced a
totally different spike – that caused by
nervous stress and tests have shown that
most antiperspirants actually increase
skin conductivity I may not have beaten
the lie detector but a failed test isn’t
enough for a conviction in a UK court of
law although it might help persuade a
jury
hi they um uh doctor take a seat the lie
detector or polygraph we’ve all seen the
movies some steely-eyed spy trying to
conceal the truth from a mysterious
interrogator but can you beat a lie
detector in real life lying is stressful
business the natural physiological
reactions to telling a big fat whopper
is that your pulse quickens you breathe
faster and you start to sweat polygraphs
work by detecting these changes so any
spike on the chart can indicate stress
and therefore the possibility of a lie
so the key to deceiving a lie detector
is to try and hide your real stress
levels 24 hours earlier I nicked
Richards games console
the question was could I hide my act of
dishonesty from the machine I was hooked
up to it so that my breathing skin
conductivity and blood pressure could be
measured polygraph tests start with the
examiner asking a series of basic
questions to which the answers are known
to be true this establishes a baseline
which indicates the average stress
levels of that individual
now one rumor technique used by Old
Spice was to put a drawing pin in their
shoe now I’m going to press my toes down
onto this pin during the baseline
questions hopefully the pain will
increase my stress levels so that during
the potentially incriminating questions
my nervous stress won’t register any
higher on the chart okay I’m going to
ask you a series of questions I just
need you to answer yes or no to each
question are you known as Johnny yes is
today Tuesday yes keep perfectly still
following which is quite difficult when
your big toes jammed down on a drawing
pin are you wearing a gray jacket yes
with the baseline questions over it was
time for the main interrogation to begin
I was also hoping another trick might
fool the Machine stress makes you sweat
more which increases your skin
conductivity putting telltale spikes on
the graph so earlier I’d sprayed my
fingers with antiperspirant to reduce
the flow
the tester started regarding the missing
games console do you intend to answer
truthfully each question about that yes
prior to age 25 did you ever steal
anything from a shop yes famously in the
late 80s CIA agent Aldrich Amos
beat two polygraph tests while he was
spying for the Russians by apparently
just being super relaxed have my
techniques worked with similar results
prior to 2005 have you ever taken
anything from a friend knowing you would
not return it no do you know where the
missing games console is right now No
did you take the missing games console
that we could be using no well Johnny it
would come at the end of your test and
I’m afraid to tell you that you actually
failed the test there’s one particular
question which was did you take the
missing games console from the bench in
the lab and it shows a significant
change in your breathing in your
galvanic sweat resistance and your blood
pressure you fail one question so you
fail the entire test I’d made a fatal
error
apparently the pain induced stress
caused by the drawing pin produced a
totally different spike – that caused by
nervous stress and tests have shown that
most antiperspirants actually increase
skin conductivity I may not have beaten
the lie detector but a failed test isn’t
enough for a conviction in a UK court of
law although it might help persuade a
jury
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