The simulation was first run for boundary values a = {15, 20, 25, 30, 35}, which caused the sampling process to stop early, indicating too small boundaries. Further analysis indicated that this scaling issue may have masked the effect of the parameter a on decision quality and may have produced an artifical interaction between the a and s (switching probability) parameter. I.e., decreasing values for s cause larger samples that are consecutively drawn from a given prospect. For absolute boundaries, this may cause the prospect attended first to reach the boundary without drawing a single sample from the other prospect. For relative boundaries, somewhat similarily, this may cause the comparisons of sums over increasingly unequal sample sizes immediately after switching between prospects.
The simulation was thus rerun for boundary values a = {40, 45, 50, 55, 60, 65, 70, 75, 80}. Because a very large memory space that is required by the simulation, the rerun was split for the rows 1 to 122 in the set of parameter combinations and the rows 123 to 180, respectively.
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The simulation was thus rerun for boundary values a = {40, 45, 50, 55, 60, 65, 70, 75, 80}. Because a very large memory space that is required by the simulation, the rerun was split for the rows 1 to 122 in the set of parameter combinations and the rows 123 to 180, respectively.