Do their results map to their hypotheses from the article's Introduction?
Are complex statistics explained well, and are they justified above simpler statistics? (This might also be in a data analysis section in the methods.)
Are the statistics explained in plain language?
Are there tables and/or graphs to show the results? Are they well labeled and discussed within the text? Are they easy to understand?
If there are graphs comparing across conditions, are all of the y-axes on the same metric?