Artifact interactions retard technological improvement: An empirical study
Fig 5
Scatter plot of Pearson correlation coefficients for KJ (improvement rates) and 1/KW (reciprocal of normalized count of keywords) for 20 groups.
The average correlation coefficient (r) is +0.59 with standard deviation of 0.10. The coefficient value for 27 domain as a whole is 0.56. Each group consists of a combination of 14 randomly selected domains from the 27 domains.