How sensory information is interpreted psychologically. Sensory organs and anatomy belong in The Senses; physical light phenomena belong in Optics.
Test your knowledge with these top questions!
Which Gestalt principle explains seeing a circle in a ring of broken dashes?
Closure lets the brain fill gaps, so dotted outlines still read as whole shapes.
What does a just-noticeable difference measure in perception?
It marks the point where a change in weight, brightness, or sound first becomes detectable.
While following one chat at a crowded dinner, which word in an ignored chat often grabs a listener's attention?
The brain keeps a light watch on ignored speech, so a personally important cue like a name can pull attention back.
Under Gestalt similarity, why do fans wearing matching jerseys look like one group?
Similarity groups matching color, shape, or size, so uniforms signal one team at a glance.
After staring at a waterfall, why can still rocks nearby briefly appear to drift upward?
Staring adapts downward-motion detectors, so the balanced system briefly biases still scenes in the opposite direction.
Which depth cue makes parallel train tracks appear to meet in the distance?
The brain reads converging lines as distance, so long hallways and roads trigger the same effect.
Why does cold pool water feel less cold after a few minutes of swimming?
Cold receptors quiet down when temperature stays steady, freeing attention for swimming and surroundings.
Which color vision test hides numbers inside circles of colored dots?
The plates are named for Japanese eye doctor Shinobu Ishihara, who designed them to catch red-green deficiency.
In which setting is one extra TV volume step easiest to notice?
A small sound stands out against silence but blends into loud background noise.
Human color vision in daylight depends mainly on how many types of cone cells?
Each cone type responds most to short, medium, or long wavelengths, roughly blue, green, or red light.