an apparent trendp < 0.05
Despite an apparent trend (which disappears when using concentration-invariant subpopulations identified with p < 0.05 as the significance criterion), there is no statistically significant difference (Wilcoxon ranked sum test p > 0.05, see new Figure 6—figure supplement 1 ) between trial-to-trial correlations for responses to odorants at low (0.01%) versus high (1%) concentrations.