Figure 1.
The stimuli were located at one of four distances from the center of the screen along one of four meridians (0°/180°, 45°/225°, 90°/270°, or 135°/315°).
The figure shows a stimulus pair separated by 24° along the 135°/315° meridian. Note that the meridians and distance markings were not visible to participants and are included here only for illustration.
Figure 2.
Sequence of events in one trial from the Fixate Target condition (top panel) and the Fixate Center condition (bottom panel).
In the top panel, the two stimuli appear on the 90°/270° meridian. In the bottom panel, the two stimuli appear along the 0°/180° meridian.
Table 1.
Mean (standard deviation) percentage of correct responses for experts and novices in the Control condition.
Figure 3.
Percentage of correct responses in the Fixate Target condition (top panel) and the Fixate Center condition (bottom panel) for experts and novices as a function of stimulus separation.
Symbols represent across-subject means, and error bars show standard deviations.
Table 2.
Mean (standard deviation) percentage of correct responses for experts and novices in the Fixate Target and the Fixate Center condition.
Table 3.
Mean (standard deviation) percentage of correct responses for both conditions with stimuli at the same actual distance from fixation.