Figure 7. Counteracting the ipsilesional bias in neglect.

(a & b) Mean horizontal location of exploratory fixations on null trials as a function of bias of the background luminance (γ), for (a) patient KB and (b) patient LE. Red lines represent the cumulative gaussian functions that best fit each patient’s data; the arrows indicate the luminance bias (γ₀) that minimizes the mean deviation of each patient’s exploratory fixations from the centre of the display. The corresponding search array is shown in the inset.

(c, d & e) Distribution of exploratory fixations on null trials for patient KB (left) and patient LE (right), when (c) display luminance is uniform (γ = 0), (d) luminance is adjusted to compensate for each patient’s rightward bias (γ = γ₀), and (e) luminance is biased further to the left (γ < γ₀).