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. 2012 Oct 31;32(44):15284–15295. doi: 10.1523/JNEUROSCI.1132-12.2012

Figure 1.

Figure 1.

Experimental conditions and predictions of experiment 1. While fixating the central fixation cross, subjects attended the LVF (dashed circle) for discriminating the orientation of a target grating (shown left to fixation). The target was either vertical or horizontal (template) and paired with a task-irrelevant orientation probe in the unattended RVF (black gratings). The orientation of the probe differed from the orientation of the target by seven possible orientation differences (OD0°, OD15°, OD30°, OD45°, OD60°, OD75°, and OD90°), here shown with reference to a vertical target. The diagram sketches the predictions of experiment 1, with the predicted brain response to the probe being plotted in the y direction. If the probe response reflects the similarity between the orientation of the probe and the template (template matching), the response should be largest for OD0° and OD90° trials, with OD45° showing the smallest response (filled circles). In contrast, if the probe response reflects the similarity between the orientation of the probe and the actual orientation of the target on a given trial (discrimination matching), the response should be largest for OD0°, intermediate for OD45°, and smallest for OD90° trials (open circles).