| A | B |
|---|
| Threshold | An edge or a boundary |
| Absolute Threshold | The minimum stimulation necessary for a person to detect a particular stimulus 50% of the time. |
| Difference Threshold | The minimum difference that a person can detect between two stimuli 50% of the time. Also called just noticeable difference. |
| Sensory Adaptation | Diminished sensitivity as a result of constant stimulation |
| Weber's Law | detection of a stimulus depends on the original stimulus itself. |
| Signal Detection Theory | Whether or not you detect a stimulus is dependent upon three kinds of variables: Stimulus variables, Environmental variables, Organismic variables |
| Selective Attention | Focusing conscious awareness on a particular stimulus to the exclusion of others |
| Perception | Top-Down Processing |
| Sensation | Bottom-Up Processing |
