Figure 6. Object-based cueing effects (i.e., the difference between Invalid-same and Invalid-different trials) and 95% confidence intervals for each subject in Experiment 1 for horizontal (left) and vertical (right) objects in the discrimination task.

Significant cueing effects are denoted by filled circles. The circles on the right side of the zero difference line denote a positive difference, which is in the direction predicted by theories of object-based attention.