Temporal mechanisms underlying flicker detection and identification for red–green and achromatic stimuli

Abstract

We have simultaneously measured detection and temporal frequency identification for both red–green isoluminant and achromatic stimuli over a range of temporal frequencies for two observers. Results show that temporal frequency identification can be made along the temporal frequency dimension for both red–green and achromatic stimuli at contrasts close to detection threshold. In general, temporal frequency identification was better for the achromatic than for the red–green stimuli; however, the level of chromatic identification performance was still sufficient to permit us to reject the notion that the red–green mechanism embodies a single temporal filter. We have developed a model based on s..