Figure 9

Counterbalancing the function of the stimuli. (a) When the red ellipse is the target, C+F+, the red rectangle is the color-overlap distractor, C+F-, the blue ellipse is the form-overlap distractor, C-F+, and the blue rectangle serves as standard distractor, C-F-. (b) When the blue ellipse is the target, C+F+, the blue rectangle is the color-overlap distractor, C+F-, the red ellipse is the form-overlap distractor, C-F+, and the red rectangle serves as standard distractor, C-F-. (c) When the red rectangle is the target, C+F+, the red ellipse is the color-overlap distractor, C+F-, the blue rectangle is the form-overlap distractor, C-F+, and the blue ellipse serves as standard distractor, C-F-. (d) When the blue rectangle is the target, C+F+, the blue ellipse is the color-overlap distractor, C+F-, the red rectangle is the form-overlap distractor, C-F+, and the red ellipse serves as standard distractor, C-F-.