1. Visual Illusions Selectivity of Perception
Sense Perception
Visual Illusions
Selectivity of Perception

2. Agenda Discuss the four type of visual illusions
Discuss the selectivity of perception
END GOAL: Dig deeper into sense perception and start making your own connections to the material.

3. What do you see?

4. What do you see? “Father, Mother, Daughter” Picture
Why do you think we all see different things in this picture? Explain.

5. Perceptual Illusions
Perception = a lot is going on that we are not aware of
Conscious awareness, or lack there of
Sensation
Provided by the world
Interpretation
Provided by our minds
We are not often aware of our minds interpreting our senses

6. Perceptual Illusions Four kinds of visual illusions
All arise from interpretation, not sensation
Context
Figure and Ground
Visual Grouping
Expecations

7. Context
The way we see something depends partly on the context in which we see it
The context of this pic, makes them look different sizes
PERSPECTIVE

8. Context
In every day life, we are constantly making contextual judgments without being consciously aware of it
Implication: we usually judge the size of an object by looking at the overall context.

9. Figure and Ground
Highlight certain parts of what we see, and treat the rest as background
Ambiguous figures
When looking at a paper, we ignore the white background and focus on the letters.

10. Visual Grouping Natural tendency to look for meaning
We are not given a lot to go on, but we can still make out a man,

11. Expectations We expect something to be there
That affects our perception because we rush over

12. Question 1
We suffer not only from visual illusions, but also from illusions with each of our sense. Can you give some examples of illusions with hearing, touch, taste, and smell?

13. Role of Unconscious Visual agnosia
Psychologists – many interpretations are made at an unconscious level
Generally:
Vision is a matter of light and wavelengths
Never think: oh, those patches of color are a desk.
Visual agnosia
Brain damage
Lose the ability to interpret what they see

14. Quote 3 “Where there is no vision, there is no hope.”
George Washington Carver
What is the difference between vision and sight?

15. Quote 1
“The only thing worse than being blind is have sight but no vision.”
Helen Keller
What does this quote mean?
What are some examples in your own life? Society? What about a leader with slight but no vision? Benefits? Flaws?

16. Sense Perception: Visual Illusions Continued!
10/1

17. Agenda Discuss quote from yesterday.
TED Talk: Optical Illusions Show How We See, Beau Lotto
Reflection on TED Talk.
End Goal: Dive deeper into the affects of visual illusions on your vision and its reliability.

18. Quote 2 “Vision is the art of seeing what is invisible to others.”
Jonathan Swift
What does this quote mean?
What are some example of what you can see that is “invisible” to other people around you?

19. Ted Talk

20. TED Talk Reaction What are your reactions to this video? Surprising?
Agree/Disagree?
Relate to?

21. Quote 1 “The sense aren’t fragile.” –Beau Lotto Agree? Disagree?
What does it mean for a sense to be fragile?
Is one sense more fragile than the either? Is one more strong?

22. Quote 2
Is your sight reliable? Can you ALWAYS trust the knowledge you gain from your sight? When can you? When can you not? Whose sight do you trust? Whose do you not?