1. The Senses

2. discuss NOW with the person beside you:
Which sense would you be most willing to give up? Why?
Which one would you least like to lose? Why?

3. The Senses
The senses are _______________________________________________________________________________
Sight
Hearing
Taste
Smell
Touch

4. Sensation:
Is ____________________________
Starts with the senses
- In other words, your _______ takes in ___________ to help it __________ the world

5. – this is called ___________
What is Sensation?
we detect ________________(stimulus) from the environment through our _______ _____________________
sensory organs have _________________
the physical energy is then ____________ into _____________(these are signals sent to the _________________)
– this is called ___________

6. Sensory Receptors
The ____________ is interpreted by the appropriate ____________________(eg. You touch a hot stove),
the message travels to “________________” areas of the brain
the message travels along _______________________
our _________ receives and interprets the neural signals, causing __________________ 

7. Sensory Adaptation
Diminished _____________ as a result of constant _______________.
-Ever forgotten you are wearing a ring or a watch?
-Ever gotten used to a smell?
After drinking tea with lemon, a grapefruit won’t taste so sour.
After eating a doughnut, however, a grapefruit will taste extremely sour.

8. Turn to the person beside you and say
TRANSDUCTION is when your sensor organs turn physical energy from your senses into electrical energy that goes to your brain!!!
SENSORY ADAPTATION is when you don’t sense something because you have become used to it

9. Just noticeable diffErencE
ee/ x/334868/webers_mx.swf
Experiment with sounds
Difference

10. Just noticeable differencE
The _____________________ that a person can __________ between two stimuli _________ of the time.
Also known as ______________ _____________________
This relates to ______________

11. Weber’s Law
The idea that, to perceive a ___________ between two _________, they must differ by a constant ______________; not a constant ___________ (logorhythmic increase NOT linear increase)

12. Applying Weber’s Law
If the cost of a pop is $.50 and it goes up by $0.50, it is very noticeable.
If the cost of a television is $500 and it goes up by $0.50, it is not noticeable.
BUT, if the cost of a pop went from $ .50 to $1.00, you could say that the price doubled
to get the same increase in the cost of the tv, it would have to go from $500 to $ YIKES! .

13. Applying Weber’s Law
In sales – sell the more expensive item first. Then accessories or add-ons don’t seem so bad (ie, buying satellite radio for your car. After agreeing to spend $20,000, an extra $500 a year doesn’t seem ridiculous).

14. Turn to the person beside you and say
Weber’s law is the difference in percentage, NOT amount, when it comes to noticing a stimulus
How high do YOU have to turn up the volume on your device to notice an actual difference?

15. Absolute threshold
We sense only a _____________ of the info coming at us.
We can’t see everything (like X-rays or radio waves) or hear everything (the family dog can hear much more than us).
Take sound for example, at some point there is a point where we can’t hear a frequency (but the dog still can).
This ______________to sensation is called the ______________________

16. Absolute threshold
It’s defined as the ____________ stimulation needed to __________ light, a sound, a pressure, taste or odor _____ _______________________________
As an example, people lose the ability to hear high-pitched as they grow older.
Mosquito Ring tone Experiment
g_test/