PSYCO104 Lecture Notes - Lecture 17: Ryback, Bors

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October 17 2014
TL - 11
Self Awareness
Not all animals have self-awareness, and humans only tend to develop it
around
the age of two.
E.g. Cat seeing itself in a mirror does not seem to recognize that it is
looking at itself
The Rouge Test
Place a mark somewhere on the body that the participant/animal cannot
see on
their own (e.g. forehead).
Place the participant in front of a mirror
Observe whether the participant attempts to wipe the mark off itself.
The Libet experiment (1985)
Changes in electrical activity within our motor cortex can be seen up
to 2
seconds prior to the desire to act
Method
Participants are shown a dial, a button stops the dial. They are
asked to
press the button to stop the dial from moving and then move the
dial back
to where they intended to actually have it stop.
Results
About 0.25 sec avg delay between button press and where they
wanted the
dial to be stopped.
Electrical signals up to 2 seconds before the desire to respond.
We thus prepare to act before we are aware of preparing to act
Sleep
Measured electrical activity of the brain goes through 5 distinct
stages
while we sleep
How much time we spend in each stage of sleep depends on how long we've
been
sleeping for
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