This paper seems to mask just how much of an effect there is. For the people who aren't deep into stats and reading statistical scientific papers, can someone h

This paper seems to mask just how much of an effect there is. For the people who aren't deep into stats and reading statistical scientific papers, can someone help translate what the z-scores here mean practically? Is this a log scale or just raw? What's setting 0.0? Is +/- 0.1 a notable range?