Figure 1. Experimental tasks.

I. and III. Control task before and after the crossmodal spatial cueing task. Brief (100 ms) vibro-tactile S₁ stimuli were randomly delivered to the left or right index finger. II. Time course of a valid experimental trial in the crossmodal spatial cueing task. Each trial began with a 100 ms vibro-tactile S₁ stimulus delivered randomly to the left or right index finger. After an ISI of 617 ms a bright square was presented in one of the screen's quadrants for 200 ms. Subjects pressed the left or right foot pedal to indicate whether the square appeared in the upper or lower half of the screen. Three quarters of the S₂ stimuli appeared on the same side as the S₁ stimulus. During and in between trials-i.e. permanently-subjects fixated a cross in the center of the screen.