Figure 1.

Schematic overhead view of the experimental apparatus. The observer sat in a chair surrounded by a table; access to the chair was gained via a removable panel in the table top. Targets were placed at different azimuths (relative to the center of the table) on a large circle inscribed on the table. A pointing device was mounted on the chair in front of the participant. The center of the pointing device was offset 26 cm in a horizontal plane from the center of the chair.