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. 2016 Jun 13;6:27725. doi: 10.1038/srep27725

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(A) Just noticeable difference (JND) thresholds for the Discontinuous condition, comparing between reference velocities (blue = 30°/s, red = 60°/s) and velocity direction (Decrease = left group, Increase = right group). Individual results are shown. (B) Similar to (A) but for JND Thresholds for the Continuous condition. (C) Average JND thresholds versus reference velocity, also shown are thresholds for Carlile and Best⁸. (D) Weber fractions versus reference velocity.