sensation and perception n.
Skip this Video
Loading SlideShow in 5 Seconds..
Sensation and Perception PowerPoint Presentation
Download Presentation
Sensation and Perception

Loading in 2 Seconds...

play fullscreen
1 / 31

Sensation and Perception - PowerPoint PPT Presentation

  • Uploaded on

Sensation and Perception. Front of Class. Computer Area. As you come in … Find your new seats! Take a new Table ofContents from stool Write down today’s Focus Question : What are sensation and perception and how are they linked?. Desk. Z. McGuire. Nadia. Kevin. Maria. Sondra.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Sensation and Perception' - sabine

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Front of Class

Computer Area

As you come in …

Find your new seats!

Take a new Table ofContents from stool

Write down today’s Focus Question:

What are sensation and perception and how are they linked?


Z. McGuire








Human Behavior 2


















Z. Melo





Computer Area

Front of Class

As you come in …

Find your new seats!

Take a new Table ofContents from stool

Write down today’s Focus Question:

What are sensation and perception and how are they linked?










Human Behavior 5





















basic assumptions
Basic Assumptions

Essential Question: How do external and internal stimuli affect our perception of ourselves and of the world around us?

  • The only way we know we exist in this world is through our senses
  • The only way we interact with our world is through the perception of these senses
  • In doing this, we create our reality.

Today’s notes: on your own. I have underlined anything worth writing down

an introduction
An Introduction:
  • Ted Talks are AWESOME
  • Beau Lotto – founder of a hybrid art and science lab
  • Start-1:50
what are these abilities sensation and perception
What are these abilities: Sensation and Perception



Process of assembling and organizing information to give it meaning

Beau told us to compare the colors, he gave the colors names, we evaluated the colors, etc.

  • process of receiving information from our environments
    • Beau showed us colors on a board, he describes that our eyes/brain picks up light and that is color

Sensory information is MEANINGLESS, it’s what we do with that information that matters

Let’s see it again…in action



  • “The Cow Gave Cola”
  • .rat eht saw tacehT
  • “The cat saw the rat” or “the cat was the rat”

And again…


I cdnuoltbleveieetaht I cloud aulacityuesdnatnrdwaht I was rdanieg. The phaonmnealpweor of the hmuanmnid, aoccdrnig to a rscheearch at CmabrigdeUinervtisy, it dseno'tmtaetr in wahtoerdr the ltteres in a wrod are, the olnyiproamtnttihng is taht the frsit and lsatltteer be in the rghitpclae. The rset can be a taotlmses and you can sitllraed it whotuit a pboerlm. Tihs is bcuseae the huamnmniddeos not raedervylteter by istlef, but the wrod as a wlohe. Azanmig huh? yaeh, and I awlyastghuhotslpeling was ipmorantt!

what just happened
What just happened?
  • Our brains received information (meaningless, in this case) but our brain since pre-K has learned to read and understand languages
    • Therefore, we perceived it to make sense!
  • We wanted to make the abnormal information normal again…
    • Beau has another great trick up his sleeve in which he redefines normal and reality: 5:24
so why do we need these abilities
So why do we need these…abilities?
  • Beau again (for the last time): 2:00-3:00
  • Sensation and perception not only allow us to read and see different colors…
  • But from the evolutionary perspective, the purpose of sensation and perception is to improve a species’ chance of survival
    • An animal must be able to sense stimuli, perceive that stimuli, and respond quickly
    • Under this assumption, we can see colors…to see the predator
how do we have these abilities
How do we have these abilities?
  • Specialized cells throughout the 5 senses detect stimulus information (sense) and transmit it to the brain to be given meaning (perception)
how do we get our senses and our perception to work thresholds
How do we get our senses…and our perception to work? Thresholds

Absolute Threshold

Difference Threshold or the just noticeable difference

The degree of difference that must exist between two sensory stimulations before the difference is detected

How different do two colors, for example, have to be for you to declare, “these are different!”?

Weber’s Law: the difference in stimuli must be proportionate to each other (amount, like the first example) doesn’t matter

  • the minimum amount of sensory stimulation needed for sensation (and thus perception) to occur
    • This differs between people – some have better hearing, vision than others
  • Average Absolute Thresholds for the 5 senses
weber s law examples
Weber’s Law Examples
  • music and friends
    • Low volume, any change is noticeable
    • High volume, changes may not be noticeable
  • Candles
    • Add 1 candle to 20 – will we notice a difference?
      • Yes
    • Add 1 candle to 120 – will we notice a difference?
      • Probably not
    • Add 7 candles to 120 – will we notice a difference?
      • Probably
getting used to the stimulation sensory adaptation
Getting used to the stimulation: Sensory Adaptation
  • A diminished sensitivity to a stimulation due to constant sensory stimulation
    • Examples:
      • That GREAT smell when you walk into a restaurant…soon disappears when you get your even better food
      • The bath that is WAY TOO HOT to get in…is soon enjoyable
      • You are BLIND walking into a dark movie theatre…and then you are BLINDED as you emerge into the light
  • One characteristic of individuals on the autism spectrum is a unique sensitivity to sensations (too much, too little, no adaptation, etc.)
    • Speaking of our movie theatre example…some movie theatres have Sensory Friendly showings for families with individuals on the spectrum – lights on, sound low, you can get up and walk around/sing/dance
exit slip and homework
Exit Slip and Homework
  • Exit Slip: What are sensation and perception…in your own words
  • Homework: using any of the new terms from this PowerPoint, create/discover your own example.
hello as you come in
Hello, as you come in…
  • Take an article from the stool
  • Read the article
    • Think about and answer these questions:
      • How does Synesthesia represent a conflict of our sensation and perception?
      • Have you ever experienced synesthesia? Example: Seeing yellowmakes many people feel warm
  • Dates to remember: NEXT 1 Day – assessment on sensation and perception
exit slips revisited 5
Exit Slips: Revisited 5



The way you react to that specific feeling

Getting that information organized to find meaning

one’s view of the world

Understanding your senses

To create a purpose for information

  • A feeling you have
  • Gettinginformation
  • Using senses to discover what is around you

Sensation and perception are responsible for reality

now what about those thresholds etc
Now what about those thresholds, etc.?
  • On the back of your Synesthesia worksheet, number down the page 1-5
  • Share your example with 5 different people in the room.
a video
A video:
  • Our visual sensation is remarkable at completing simple visual tasks when given clear directions
    • Nearly 100% of you will get this correct
selective attention
Selective Attention!
  • Focusing on a specific aspect of experience while ignoring others
    • Familiar example: cocktail party effect: ability to concentrate on one voice among many in a crowded area
  • Also,inattentional blindness – the failure to detect unexpected events when our attention is engaged by another task
when selective attention fails you
When selective attention fails you

This task required you to ignore some information (the word) and selectively attend to different information (the color).

Reading takes less attention than naming colors (think of when your mind wanders as you read a book).

Therefore, when you are forced to drop the easy task (reading) in place of the harder one (color), it is increasingly difficult to change your attention.

as you come in
As you come in…
  • Where are we on FQs? – short unit, 4 FQS in total
    • Yesterday’s #2: What are we actually seeing when we see?
    • Today’s #3: Why does visual stimuli sometimes mislead our perception of reality?
  • Then, grab a book from yesterday and work on packet – these are the bare minimum questions that need to be completed:
    • The Stimulus Input: Light Energy
    • The Eyenumbers 1, 2
    • Color Vision numbers 7, 8, 10, 12
    • Color Constancy numbers 13, 14
as you come in1
As you come in…
  • Today’s LAST FQ: How do our other senses create a complete reality?
  • Who will not be here Tuesday?
  • Who will not be here Wednesday?

Electromagnetic Spectrum

  • The wavelengths that enter our eye as visible light are only a small part of the E.S.
  • The Eye
  • Light enters the eye at the pupil, depending on the shape of the iris
  • Light is focused by the lens
  • The image created by light lands on the retina in the back of the eye like film
  • The retina is comprised of rods – cells sensitive to light and cones – cells sensitive to color

Difference Threshold

  • LOW – we can see 7 million colors
  • Why We See Colors
  • The tomato is everything but red
  • Objects absorb all light except one wavelength
  • That wavelength enters our eye as the color of the object

Our brains construct our experience of color

  • Cones
  • Specific cones are sensitive to an individual primary color
  • All colors are a combination of these cones

The Tomato is NOT red

  • Color Constancy
  • If illumination changes, an object’s color stays the same
  • We try and find the ESSENCE of something

The Tomato is many shades of red

One cone is responsible for the tomato’s redness

The tomato is red in the morning, noon and night

the other senses
The Other Senses
  • Your Task: Choose one of the other senses – taste, touch, hearing
  • Describe in the most basic terms how it works – you do not need to be overly anatomical
  • Describe any “phenomena” associated with that sense
  • Create or find a real life example of that “phenomenon” in action