Fig. 2

Relationship between research impact and interdisciplinarity. a The histogram for the interdisciplinarity index (median = 1.2, range = 2.5, interquartile range = 0.58); b The histogram for the log-transformed research impact (mean = 1.2, SD = 0.83); c The scatterplot showing the associations between the interdisciplinarity index and the log-transformed research impact. The solid line in the scatterplot represents the robust linear model fit. The shaded region and the dashed lines, respectively, indicate the 95% confidence interval based on the standard error of the mean and on the standard error of the forecast, including both the uncertainty of the mean prediction and the residual