Vocabulary Cards
What To Do & What Not To Do
Retinal Disparity
DEFINITION - a binocular cue for perceiving depth; by comparing images from the retinas in the two eyes, the brain computes distance. The greater the disparity (difference) between the two images, the closer the object.
It is just a wordy re-writing of the definition. It does not show you can give an example in the real world. This will no longer be accepted. 1 card like this means no credit for any of them.
Retinal disparity is a depth perception cue in both eyes that allows the brain to measure distance. The eyes see two separate images. When both are transmitted to the brain, the brain measures the difference in the two images (that movement the objects seem to endure when one eye is opened at a time) and pieces them together to calculate the distance. The larger the difference between the images, the closer the object is.
This is my example from class with a substitution of a pencil or an index card. You must come up with original examples of your own from the real world. Changing my examples with a different, time of year, or object is not acceptable. 1 card like this means no credit for any of them.
When a person puts their finger/pencil/index card out in front of them and closes one eye. When they switch eyes it looks like the finger/pencil/index card is moving and covering other objects. The more movement the finger/pencil/index card seems to make the greater the disparity and closer the finger/pencil/index card.
Totally original with a behavioral outcome and real world application.
Stereoscope toys or Viewfinders use retinal disparity. When the kid looks through the two lenses they see two slightly different images in their right and left eye. The brain fuses these two images to perceive the image as 3 dimensional and the object appears to be floating in space. If they close one eye, the object now appears to be flat and 2 dimensional.
Color Constancy
DEFINITION - Perceiving familiar objects as having consistent color, even if changing illumination alters - the wavelengths reflected by the object.
This is from the textbook, changing the word “bowl” to “bucket” is not an original example. 1 card like this means no credit for any of them.
If you view an apple in a bucket of fruit, its color will remain the same as the lights get dimmer or change.
It is not an example from lecture or the book; it is original and shows deep understanding and how color constancy affects perception of color (the behavioral outcome).
I paint my dining room a new shade of deep brick red. When I apply the paint I am using a bright work light so I don’t miss any spots. The next day when I turn on the chandelier in the dining room the red paint looks the same color even though the chandelier isn’t as bright as the work light. This happens because my brain holds the red constant even though it should appear darker due to the actual decrease in light energy.