Are You Highly Sensitive? A Self- test.

Read and answer survey questions

Add your totalrange between 27-189

100+ = sensitive

Unit 5:Sensation and Perception

Objective 1: What are sensation & perception?

• Sensation– the process by which our sensory receptors and

nervous system receive and represent stimulus energies from our environment

• Perception– process of organizing and interpreting sensory

information, enabling us to recognize meaningful objects and events

• One continuous process

Prosopagnosia

http://www.youtube.com/watch?v=dxqsBk7Wn-Y

Objective 2:What three steps are basic to all our sensory systems?

1. receive sensory information

2. transform that stimulation into neural impulses

3. deliver the neural information to your brain

TRANSDUCTION – the process of converting one form of energy into

another form that your brain can use

Objective 3: What are absolute & difference thresholds? What

is Weber’s Law?

Absolute threshold the minimum stimulation

necessary to detect a particular stimulus 50% of the time.

ThresholdsDifference Thresholds

Difference thresholdJust noticeable difference (jnd)

Smallest difference between 2 stimuli which a subject can detect at least 50% of the time

The detectable difference

increases w/ the size of the stimulus

Weber’s LawTwo stimuli must differ by a constant proportion not a constant amount for a difference to be detected

The louder the sound is, the brighter a light is, the more you would have to change it, proportionally, to notice a difference

If the just-noticeable difference (jnd) for a 10 ounce weight is 1 ounce, the jnd for an 80 ounce weight would be _____ ounces

a. 1b. 2c. 4d. 8e. 10

Joey’s bag of marbles is twice as heavy as Luke’s. If it takes 5 extra marbles to make Luke’s bag feel heavier, it will take 10 extra marbles to make Joey’s bag feel heavier. This best illustrates

a. absolute thresholdb. sensory adaptationc. Weber’s Law

2 stimuli must differ by a constant proportion for their difference to be

perceived

Just noticeable difference

Just noticeable difference

Just noticeable difference

Just noticeable difference

Just noticeable difference

Just noticeable difference

Just noticeable difference

Just noticeable difference

Just noticeable difference

Just noticeable difference

Just noticeable difference

Just noticeable difference

Just noticeable difference

If an adult develops cataracts, his or her

A. absolute threshold for light is likely to increase.

B. difference threshold for light is likely to decrease.

C. absolute threshold for light is likely to decrease.

D. difference threshold for light is likely to remain unchanged.

E. Absolute threshold for light is likely to remain the same.

Some people are better than others at detecting slight variations in the tastes of various blends of coffee. This best illustrates the importance of

A. Absolute thresholdB. Difference thresholdC. Subliminal stimulation

You are going to briefly look at a picture then answer some questions. DO NOT DWELL

ON THE PICTURE. Look at it long enough to “take it all in” once. After this, you will answer a series of yes/no questions.

Circus act - training a seal

Costume Ball - Dancing

HEADS DOWN – CLOSE EYES

Raise Your Hand for a “Yes” AnswerIn the picture, was there:an automobile? a man?a woman?a child?an animal?a whip?a sword?a man’s hat?a ball?a fish?

(masking stimulus)

…Objective 3…Subliminal

Under awareness

PrimeTo be made aware of a stimulusto “get ready” for a stimulusactivates unconscious awareness

Objective 4:

Subliminal PersuasionMessages under our awareness that get you to alter your behavior

Another One Bites The Dusthttp://www.youtube.com/watch?v=7MMMjLDdH-A

Objective 5What function does sensory adaptation serve?Sensory adaptation

Reduced sensitivity to a repeated stimulus

Helps us notice new stimuli in our environment

Keeps our senses from getting fatigued

Perceptual Set

A mental predisposition to perceive one thing and not

the other

Brain Games: Seeing Isn’t Believinghttp://www.youtube.com/watch?v=UyGkMhWE194

Objective 6Perceptual Set can effect what we see

Perceptual set can effect what we hearhttp://www.youtube.com/watch?v=G-lN8vWm3m0

Context EffectsCultureperspective