Figure 2.

Targets. Two targets were designed to maximize or minimize blur cues respectively. The brightly coloured clown target (top figure) and alternating green/yellow Gabor target (middle figure) (note: conversion to black and white for this illustration has resulted in loss of picture quality and apparent size difference not present in the real targets). When proximity/looming cues were included, the same target was used at every distance and was visible during target motion so that size and luminance change information (looming) was available (left bottom figure). The cues were minimized by scaling the target for each fixation distance and obscuring the monitor as it moved between fixation positions by raising a black cloth screen between the participant and the target (right bottom figure). The white square target outline is for illustration purposes only and was not part of the actual target).