3.6: The accuracy of perception

Muller lyer illusion

- our perception of the length of the vertical line segments changes, depending on the direction of the arrows at either end of line ** When the arrows extend away, line looks longerr

The apparent distance theory (moon illusion)

- the moon projects the same size img on our retina when it is on the horizon as it does when directly overhead. - but when the moon is on the horizon, many interposition cues, such as tress and buildings that stand between the moon and us, indicate distance to our brain. - when we view moon directly overhead, however , there are no interposition cues to indicate distance ** consequently, our brain thinks the moon is farther away when it is on the horizon

Q2: When you look down railroad tracks, tracks appear to converge even though they're parallel. This illusion's the result of which perceptual process?

Monocular depth cues

Cultural factors in perception

People livin in "carpentered" environments, buildings that are wood framed; have much experience w/the architectural angles that produce the Muller Lyer illusion

Q1: Sam noticed that moon looked huge as it rose above the horizon. Later, when the moon was overhead, it did not look nearly as large to her. Which of the following is though to be primary cause of this illusion?

Perceptual constancies

The Ponzo Illusion

lines of equal length that lie across converging lines appear to be unequal in length **Horizon cues tell the brain that the top line's farther away than the bottom one..