Sound localization control experiment. Speakers were shifted 4.5° eccentrically in a single session (Cat06). The standard speaker positions are represented by the filled triangle (9°,0°) and circle (18°,0°), and the test positions are represented by the filled square (13.5°,0°) and diamond(22.5°,0°). The mean final eye position for each target is represented by the corresponding open symbols (± confidence interval).