Term
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Definition
The principle that the JND is a constant fraction of the comparison stimulus:
(Triangle) I/I = K
Where (triangle) I is the difference threshold, I is the stimulus intensity, and K is the constant fraction. |
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Term
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Definition
The principle describing the relationship between stimulus magnitude and resulting sensation magnitude such that the magnitude of subjective sensation increases proportionally to the logarithm of the stimulus intensity:
S = K log R
Where S is the psychological sensation
K is a constant value
R is the physical stimulus magnitude |
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Term
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Definition
| Minimum amount of stimulation necessary for a person to detect a stimulus 50% of the time. |
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Term
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Definition
| A just noticeable difference in sensation caused by a stronger or weaker stimulus. |
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Definition
| A psychophysical method in which the particular dimension of a stimulus, or the difference between two stimuli, is varied incrementally until the participant responds differently. |
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Term
| Method of Constant Stimuli |
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Definition
| A psychophysical method in which many stimuli, ranging from rarely to almost always perceivable are presented one at a time. Participants respond to each presentation: "yes! no," -- "same, different" and so on. |
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Definition
| the minimum distance at which two stimuli (two simultaneous touches) are just perceptible as separate. |
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Term
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Definition
| A receptor that converts physical energy from the environment into neural activity. |
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Definition
| The science of defining quantitative relationships between physical stimuli and psychological responses. |
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Term
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Definition
| The smallest detectable difference between two stimuli, or the minimum change in a stimulus that can be correctly judged as different from a reference stimulus. |
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