| A | B |
|---|
| Sensation | What occurs when a stimulus activates a receptor |
| Perception | The organization of sensory information into meaningful experiences |
| Psychophysics | The study of the relationships between sensory experiences and physical stimuli |
| Absolute threshold | The weakest amount of a stimulus that a person can detect half the time |
| Rods and Cones | These are the receptors for sight |
| light waves | This is the stimulus for sight |
| Hair cells of the inner ear | This is the receptor for hearing |
| Sound waves | This is the stimulus for hearing |
| Taste buds | This is the receptor for taste |
| Hair cells of olfactory membrane | this is the receptor for smell |
| Difference Threshold | The smallest change in a physical stimulus that can be detected between TWO stimuli |
| Weber's Law | The larger or stronger the stimulus, the larger the change required for the observer to notice a difference |
| Subliminal messages | brief auditory or visual messages that are presented below the absolute threshold (50 percent chance they will be perceived) |
| Constancy | Tendency to percieve objects in the same way regardless of changing angle or distance |
| Illusions | Incorrect perceptions |
| Extrasensory perception | ability to gain information by some means other than ordinary senses |
| 4 Principles of perceptual organization | Proximity, continuity, similarity, closure |
