Chapter 5 – Perception II Nov. 4
Perceptual Problem Solving
Next Time: Sleep
Scan: p. 215-227
Second video discussion
How do we perceive depth?
What happens after we determine object distance?
How do we figure out what we’re looking at?
Q— a researcher is recording from a visual cell. The cell shows maximum firing to a spot of
light at a particular area on the screen. A slit of light decreases th firing rate. Where is the
researcher recording from? ** From a retinal ganglion cell
Principles of Grouping
Similarity, proximity, closure
Importance of expectation and context
Binocular cue: retinal disparity
o Relative size
When you look at an object, or target (all things being equal) we will
o Over lap
o Linear Perspective
Important, because straight lines will always go to a point in the back
o Texture Gradient
The density increases (ex. The whole picture is full of sunflowers)
Re-scale the size of objects so