Fig. 1.

Stimulus setup from a participant’s perspective. Stimuli (8.5″ × 11″ paper sheets at a distance of 36″, attached to card stock) were placed vertically in to a wooden apparatus, attached to the scanner bed. Start box on the right was 80 mm high × 24 mm wide. Square target box 90 mm to the left of the start box was 20 mm, 40 mm, or 80 mm wide. In between the start and target boxes, was a small square, which participants were asked to fixate as they performed the task. Movement durations were recorded via left hand button release and press. A. Small (20 mm) target box and stick are shown here. B. Large (80 mm) target box and weighted laser are shown here.