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. 2014 Nov 3;8:218. doi: 10.3389/fnsys.2014.00218

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Copyright © 2014 Emadi, Rajimehr and Esteky.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Monkeys' eye movements in HBT and LBT. The power spectrum of the monkeys' horizontal (X) and vertical (Y) eye positions in single trials, during baseline period (−300–0 ms), is shown. To test if the results were different between HBT and LBT we performed a permutation test, separately for horizontal and vertical positions. In the permutation test, the trials were randomly assigned to HBT and LBT while keeping the number of trials in each condition unchanged. We compared the experimental spectral power difference with the distribution of spectral power differences obtained from 1000 such permutations. The results showed that the difference between the spectral power of HBT vs. the spectral power of LBT, for the horizontal or vertical positions, was not significant (P > 0.05).