Reduction of homing errors with more landmarks.

Shown are the results of an analysis of the effect of different numbers of identical landmarks (trees) on performance in a virtual triangle completion task (see ‘Showcase Part B: homing with landmarks’ in main text). The leftmost, separated part of the figure shows comparison data for the same translation velocity (2.5 m/s) collected in the previous experiment (Showcase A) in which no landmarks were present but the walked path was the same. The rest of the figure shows data from Showcase B. For each experimental condition (1-3 landmarks), position errors for integrated pointing trials at the start of the return leg (1st pointing) and after a distance of 12.5 meters from the start of the return leg (2nd pointing) are shown together with the final position error of a given trial (trajectory end). Boxes show the median response for each experimental condition (from n = 18-24 repetitions) for each of N = 10 participants (different group from showcase A). Notches show 95% confidence intervals around the median, whiskers extend to 1.5x IQR, and diamonds are outliers.