Fig 4. Difference between the estimated averaging behavior and the observed behavior in each condition.

(A) Definition of averaging behavior and ΔZ_two−ave (difference between the averaging and observed behaviors). The averaging behavior was defined as the average value of Z_IMV in the two corresponding one-potential conditions (a purple line and circle). The ΔZ_two−ave (an orange arrow) was defined as the difference between the averaging and observed behaviors (a yellow line and circle). (B) Inter-participant means of the ΔZ_two−ave(circles) and ΔZ_one−ave(diamonds and squares) in the fast group (upper-left panel), slow group (upper-right panel), and both time constraint group (lower panel) were shown. One-sample t-tests with Bonferroni correction on ΔZ_two−ave in each condition was conducted using the data pooled from both time constraint group. Besides, one-sample t-tests on ΔZ_two−ave averaged across distance conditions for each uncertainty condition were conducted to evaluate the overall trend of target uncertainty and cursor uncertainty. The results revealed that the initial movement velocity deviates from the averaging behavior with a patterned bias between participation in two-target condition, while the initial movement velocity approached the averaging behavior in the two-cursor condition.