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. Author manuscript; available in PMC: 2013 Nov 12.
Published in final edited form as: Nature. 1998 Nov 5;396(6706):10.1038/23936. doi: 10.1038/23936

Figure 3.

Figure 3

Observers’ performance as a function of viewing distance and cueing condition. For both panels, performance is depicted as a function of per cent correct (left axis) and relative per cent correct, with respect to optimal performance (right axis). The data from experiments 1 and 2 were fitted to second-order polynomials. The fits’ R2 ranged from 0.8 to 0.97. a, Comparing the neutral trials of the two experiments demonstrates the effect of viewing distance on performance. Viewing the display from half the distance shifted the performance peak from 5° to 7.6°. b, Comparing the cued and neutral trials of experiment 2 demonstrates the effect of cueing on performance. Directing attention shifted the performance peak from 7.6° to 13.3°.