reading the first comment from the article, exactly my thoughts: "The trends for advantaged and disadvantaged subjects are taken from a line fit to the data po

reading the first comment from the article, exactly my thoughts: "The trends for advantaged and disadvantaged subjects are taken from a line fit to the data points on the chart. A line fitting routing will always produce a line, even to the random shot pattern of shotgun blast, but it takes human judgment to decide if the slope actually means anything. Team, look carefully at the data clouds. They are both shaped like flattened spheres and are approximately symmetrical. The line fitting routing produces a line anyway, and from this, articles are published and careers are made. Sorry, but there is no meaning here, as much as the researcher would like it to be otherwise. The distributions are nearly the same. The observation and explanation go out the window." It would be great to look at the original publication.