I have to connect an article to statistical validity. My article I am using is "Age at Drinking Onset and Alcohol Dependence". My rubric of what is being asked is....

Statistical validity: Evaluate how strongly the results support their argument.For each major result, evaluate its effect size to the best of your ability. State the effect size if it's given in terms you understand (e.g., r or d). If it's a beta in a regression table, how big is the beta for the main variable of interest, compared to the others on the table? Are the major effects statistically significant? What does this mean?As you evaluate statistical validity, discuss how strongly and how well the results pattern supported the authors' hypotheses. See if you can evaluate how strong the result is in some "real world" terms, like an increase in IQ points or a weight loss of some number of pounds, or a reaction time in seconds.