Now showing items 1-3 of 3
Two-criterion threshold techniques: Evidence for separate spatial and temporal mechanisms?
(Elsevier, 1983)
Contrast thresholds were determined for counterphase flickering and drifting spatial gratings using pattern and flicker/motion criteria. In contrast to previous reports, the two criteria yielded contrast sensitivity functions ...
Spatial frequency masking and Weber's Law
(Elsevier, 1983)
The threshold masking effect of one simultaneously presented grating upon another was studied as a function of mask contrast and frequency. The masking function typically obeys Weber's Law with method-of-adjustment ...
An inherent nonlinearity in near-threshold contrast detection
(Elsevier, 1984)
We measured an essentially normal pedestal effect using stationary gaussian targets and slowly moving pedestal gratings. Since these conditions greatly reduce the information provided by the pedestal, we question whether ...