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. 2011 Jul 22;6(7):e22342. doi: 10.1371/journal.pone.0022342

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Abrahamyan 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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This scatterplot shows mean phosphene thresholds for each participant estimated using REPT with the average stimulation frequency of 0.36 Hz on the horizontal axis and 0.16 Hz on the vertical axis. The diagonal line indicates where the two estimates are equivalent. No statistically significant difference between the slow and fast staircases was found.