Visual Illusions Selectivity of Perception Sense Perception Visual Illusions Selectivity of Perception

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.

What do you see?

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

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

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

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

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.

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.

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,

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

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?

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

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

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?

Sense Perception: Visual Illusions Continued! 10/1

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.

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?

Ted Talk https://www.ted.com/talks/beau_lotto_optical_illusions_show_how_we_see

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

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?

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?