|
Representative
Exponents
Stevens' Power Law |
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|
|
|
|
physical magnitude makes it X times larger in psychological magnitude |
| Loudness |
0.67
|
Sound pressure of 3,000 Hz tone |
1.59
|
| Brightness |
0.33
|
5° target in dark |
1.26
|
| Brightness |
0.50
|
Point source, briefly flashed |
1.42
|
| Lightness |
1.2
|
Reflectance of gray papers |
2.29
|
| Visual Length |
1.0
|
Line projected on screen |
2.00
|
| Visual Area |
0.7
|
Square projected on screen |
1.62
|
| Taste (Sweetness) |
1.3
|
Sucrose concentration |
2.46
|
| Taste (Salty) |
1.4
|
Sodium Chloride concentration |
2.64
|
| Taste |
0.8
|
Saccharine concentration |
1.74
|
| Tactile Roughness |
1.5
|
Emory cloth grades rubbed against skin |
2.83
|
| Muscle Force |
1.7
|
Static contraction "Squeeze this Hard" |
3.25
|
| Heaviness |
1.45
|
Mass of small lifted weights |
2.73
|
| Electric Shock |
3.5
|
Current (Amperes) through fingers |
11.31
|
| Vocal Effort |
1.1
|
Vocal sound pressure |
2.14
|
| Speaking Rate1 |
2.59
|
Number of words spoken per unit time |
6.00
|
| Listening Rate1 |
1.58
|
Number of words heard per unit time |
3.00
|