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. 2016 Dec 22;203(1):77–87. doi: 10.1007/s00359-016-1139-3

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© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 5 — Mantis psychometric functions for Experiment 1. Blue symbols show the mean response rate (probability of observing the optomotor response) as a function of the angle subtended by the moving grating. Error bars represent the 68% confidence interval assuming simple binomial statistics (equivalent to ±1 standard error for normally distributed data). Columns represent responses to central (left) and peripheral (right) stimuli. Rows represent responses to different contrasts. The red curves show the results of a model with 2 free parameters which were fitted simultaneously to all 6 conditions (30 data points) (M = 0.064, b = 49°; see “Methods” section for details)