Peripheral vision and pattern recognition: a review - strasburger - main
Peripheral vision and pattern recognition: a review - strasburger - main
Peripheral vision and pattern recognition: a review - strasburger - main
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<strong>Peripheral</strong>_Vision.doc<br />
Size = 1 / Sensitivity<br />
L<strong>and</strong>olt<br />
acuity<br />
E 2 Eccentricity<br />
60°<br />
Figure 11. Schematic illustration of the E 2 value. Four functions<br />
with same E 2 are shown, two linear functions with different<br />
foveal values, <strong>and</strong> two non-linear functions with same foveal<br />
value (from Strasburger, 2003b, Chpt. 4).<br />
Comparisons of slope on the basis of the E2 value are not meaningful if ...<br />
a) the foveal value is inferred rather than measured or is unreliable;<br />
b) the foveal value is not representative, e.g. because of deviations from linearity;<br />
c) normalization is not meaningful.<br />
d) Do not interpret ratios of E 2 values.<br />
Table 3. Caveats for using E 2<br />
With these caveats in mind, Tables 4, 5, <strong>and</strong> 6 show a collection of E 2 values taken or inferred<br />
from the literature.<br />
20
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