Control (30 degrees) Abrupt onset at 30 degrees ◆8个被试； ◆Distractor-与target 同时出现时的情况 (即distractor在 Control(90 degrees) Abrupt onset at 90 degrees target出现后的0ms 出现) Figure 3.Eye movement behavior in the condition in which an abrupt onset was presented simultaneously with the target(0-ms stimulus onset asynchrony).The results are collapsed over all 8 participants and normalized with respect to the position of target Control(150 degrees) Abrupt onset at 150 degrees and onset.Sample points (every 4 ms)were taken only from the first saccade.Left panels:Eye movement behavior in the control condition in which no abrupt onset was presented.Right panels: Eye movement behavior in the condition in which an abrupt onset was presented simultaneously with the singleton target,either close to the singleton target (at 30 of arc corresponding to a distance of 6.4 of visual angle,see top right panel),somewhat farther away from the singleton target (at 90 of arc corresponding to a distance of 19.4 of visual angle,see middle right panel),or at a side of the visual field opposite to that of the target singleton (at 150 of arc corresponding to a distance of 25.4 of visual angle,see bottom right panel). (Theeuwes et al.1999)8个被试； Distractor与target 同时出现时的情况 （即distractor在 target出现后的0ms 出现）。 (Theeuwes et al. 1999)