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. 2013 Nov 15;8(11):e78058. doi: 10.1371/journal.pone.0078058

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© 2013 Kretschmer et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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The response curves were calculated on basis of the individual normalized responses of the 6 animals (as in figure 8) for different values of the discrimination criterion (values from 2 to 12/s, shown to the right of each curve). The fraction of time tracked () increases when softening the criterion, but the shape of the response curve as well as the estimated visual acuity based on logistic fits of the median responses (shown in brackets on the right) remains qualitatively similar in a certain range around the standard value of = 9/s.

Inline graphic — The response curves were calculated on basis of the individual normalized responses of the 6 animals (as in figure 8) for different values of the discrimination criterion (values from 2 to 12/s, shown to the right of each curve). The fraction of time tracked () increases when softening the criterion, but the shape of the response curve as well as the estimated visual acuity based on logistic fits of the median responses (shown in brackets on the right) remains qualitatively similar in a certain range around the standard value of = 9/s.