The mean contrast threshold values by group for a) each experimental condition and b) for the trials with and without noise. Rachel L. Beattie Zhong-Lin Lu Franklin R. Manis 10.1371/journal.pone.0027893.g002 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> 2013-02-20 11:22:06 trials