Fig 1.
The landmark and line bisection task stimuli.
Landmark task: A) The right side is shorter than the left by 48 pixels, B) The left side is shorter than the right by 48 pixels and C) Both sides are of equal length. Line bisection task: A) Line jittered 160 pixels to the right of centre, B) Centred, and C) Jittered 160 pixels to the left of centre.
Fig 2.
The lane-keeping task experimental setup.
Fig 3.
Mean spatial biases for the landmark (in pixels), line bisection (pixels) and lane-keeping tasks (metres).
Individual biases are overlaid.
Fig 4.
Mean spatial biases obtained for lines presented at each location along the horizontal axis, separately for each age group, with 95% confidence intervals (2000 bootstrapped samples).
Fig 5.
Correlation plots showing the relationship between the lane position, landmark and line bisection tasks for young and older adults, with regression line and 95% confidence intervals.
Histograms show the distribution of 20,000 bootstrapped samples of the Spearman’s rho correlations, with 95% confidence intervals.