Abstract
Contrast increment thresholds were measured as a function of the background contrast of suprathreshold sine wave gratings at 2 and 8 c/deg. The resulting contrast discrimination functions obey power laws with exponents near 0.6 at 2 c/deg, and 0.7 at 8 c/deg. These exponents are influenced only slightly by pattern adaptation, gated vs continuous background gratings, and the psychophysical method. Weber's Law does not hold for contrast discrimination under any of the conditions studied.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 457-467 |
| Number of pages | 11 |
| Journal | Vision Research |
| Volume | 21 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1981 |