10.1371/journal.pone.0027893.g002 Rachel L. Beattie Rachel L. Beattie Zhong-Lin Lu Zhong-Lin Lu Franklin R. Manis Franklin R. Manis The mean contrast threshold values by group for a) each experimental condition and b) for the trials with and without noise. Public Library of Science 2013 trials 2013-02-20 11:22:06 Figure https://plos.figshare.com/articles/figure/_The_mean_contrast_threshold_values_by_group_for_a_each_experimental_condition_and_b_for_the_trials_with_and_without_noise_/379544 <p>Error bars represent s.e.m.</p>