We also found strong positive correlations between beak opening and amplitude as well as changes in tongue height and amplitude in several types of vocalization. (jeb.biologists.org)
This upward trend is reflected in a moderately strong positive correlation of 0.53 between past and future DGRs, which is statistically significant. (seekingalpha.com)
There was a very strong positive correlation between the scores from the two raters (Spearman's rho =.868, p < 0.001), indicating a high degree of consistency in ratings. (journals.plos.org)