In case you find the graphs as confusing as I did: In the first graph (predicted results), the dotted line is "internalized" (command line), the solid line is

In case you find the graphs as confusing as I did: In the first graph (predicted results), the dotted line is "internalized" (command line), the solid line is "externalized" (GUI), and the Y axis is "higher is better". In the second graph (actual results), the solid line is "internalized" (command line), the dotted line is "externalized" (GUI), and the Y axis is "lower is better". Kinda funny in an article about cognition.