Skip to main content
. Author manuscript; available in PMC: 2009 Dec 7.
Published in final edited form as: J Vis. 2008 Jan 24;8(1):16.1–1616. doi: 10.1167/8.1.16

Figure 7.

Figure 7

Orientation discrimination performance results for Experiment 3. All data are for trials in which observers chose the Standard stimulus as higher in contrast such that physical stimulus contrast is constant. The cue improved orientation discrimination when the Standard stimulus was cued, and impaired it when the cue appeared near the Test stimulus location. These performance effects confirm that the peripheral cues engaged exogenous spatial attention, and rule out response bias as an explanation for the appearance effects in Experiment 3.