Temporal-order judgment and reaction time for short and long stimuli.

The effect of intensity on visual latency was investigated. Visual latency was measured by two methods: simple motor reaction time (RT) and temporal-order judgment (TOJ). It was found, in accordance with previous studies, that the changes in RT were larger than TOJ latency when measured in the same range of intensity. Moreover, the relationship between TOJ latency and intensity was compared in two conditions: under so-called "with-offset", the information about offset order was available for the subject, while under "without-offset" conditions it was not. It was hypothesized on the ground of Jáskowski's 1991 study that the TOJ latency-intensity relation should differ for these two conditions because of the effect of intensity on visual persistence. We were unable to find any such effect.