Figure 11.

Parameter variations of the timing of the eye position signals for perisaccadic shift and flash length dependency using the non-head-centered model. The illustrations to the left of each panel show signal timings. Shown are times in which the signals reach one-half of their respective maxima and in which the CD signal peaks. Timings of the CD signal are relative to saccade onset; those of the proprioceptive signal are relative to saccade offset. A, The standard parameters of our model, same as in Figure 6, B and E. C, Outcomes with the same parameter set but without a CD signal. It can be seen that the CD signal is essential in explaining early mislocalizations. B, D–L, Variations of the timing parameters of the CD and proprioceptive signals. The offset time of the presaccadic proprioceptive signal is responsible for the amount of negative mislocalization after saccade onset. The longer it is active, the stronger the negative mislocalizations are (E, G). The onset of the postsaccadic proprioceptive signal influences the peak mislocalization around saccade onset (I, K). The onset of the CD signal controls the time the earliest mislocalizations appear (F, H). The offset of the CD signal influences mislocalizations around saccade onset (J, L). Note that, contrary to the proprioceptive signal timing (E, K), the effect of CD offset varies with saccade amplitude, with the most pronounced effect on the 35° saccade. It also affects late mislocalizations beyond 100 ms after saccade onset. The dotted lines indicate the timing of parameters in A.