Fig. 2. Mean bearings during experiment 1 in the binocular (solid arrow), left eye (dotted arrow) and right eye (broken arrow) condition. le1, le2, first and second test, respectively, with the left eye; re1, re2, first and second test, respectively, with the right eye. For comparison, the most direct path to the goal G is indicated by a bold line. `Horizon' not shown. Other symbols as in Fig. 1.