5. TRANSDUCTION
Transforming
signals into neural
impulses.
Information goes
from the senses
to the thalamus ,
then to the
various areas in
the brain.
6. THE BASICS
• Sensation is the process by which our senses
gather information and send it to the brain.
• A large amount of information is being sensed at
any one time such as room temperature,
brightness of the lights, someone talking, a
distant train, or the smell of perfume.
• With all this information coming into our senses,
the majority of our world never gets recognized.
• We don't notice radio waves, x-rays, or the
microscopic parasites crawling on our skin.
7. PERCEPTION
• Refers to interpretation of what
we take in through our senses
• The way we perceive our
environment is what makes us
different from other animals
and different from each other.
8.
9.
10. THEY WORK TOGETHER:
1) Sensation occurs:
• a) sensory organs absorb energy from a
physical stimulus in the environment.
• b) sensory receptors convert this energy
into neural impulses and send them to the
brain.
2) Perception follows:
• a) the brain organizes the information and
translates it into something meaningful.
11. ABSOLUTE THRESHOLD
• The absolute threshold is the
point where something becomes
noticeable to our senses.
• It is the softest sound we can
hear or the slightest touch we
can feel.
• Anything less than this goes
unnoticed.
12.
13. DIFFERENCE THRESHOLD
The difference threshold is the
amount of change needed for us to
recognize that a change has occurred.
EXAMPLE: When we notice the sound
of the radio in the other room, how do
we notice when it becomes louder.
It's possible that someone could be
turning it up so slightly that the
difference is undetectable.
14.
15. SIGNAL DETECTION THEORY
This concept is referred to as
signal detection because we
attempt to detect what we want to
focus on and ignore or minimize
everything else.
16. COCKTAIL-PARTY
PHENOMENON
The cocktail party effect
describes the ability to
focus one's listening
attention on a single talker
among a mixture of
conversations and
background noises, ignoring
other conversations.
Form of selective attention.
17. SENSORY ADAPTATION
Refers to stimuli
which has become
redundant or remains
unchanged for an
extended period of
time.
18. SENSORY ADAPTATION
Decreased
responsiveness to
stimuli due to
constant
stimulation.
Do you feel your underwear all day?
