To make clear the mechanism of serial dependence in quantity notion, a analysis staff carried out two exams, independently asking topics to estimate the variety of cash, or to estimate the worth of these cash, proven on-screen for half a second. The outcomes confirmed that serial dependence was confirmed in each duties and that probably the most important impact on serial dependence was not attributable to the final stimuli, however the topics final response. These outcomes point out that higher-order cognitive processing has a better affect on the prevalence of serial dependence.