| Statistical Significance vs. Practical Significance of Research Results |

| | The importance of **significant** p values is further diminished by the fact that they are easily influenced by sample size, the value of p used as the criterion for rejecting the null hypothesis, and whether the test of **statistical** **significance** is one-tailed or two-tailed. |

| | The term "practical **significance"** implies a research result that will be viewed as having importance for the practice of education or, in other words, it will be viewed as important by teachers, school administrators, policy makers, and others concerned about the day-to-day workings of education and efforts to improve it. |

| | Because **statistically** **significant** results are valued by journal editors and the research community in general, individual researchers might feel a subtle coercion to design their study to maximize the likelihood of achieving these results (by increasing the sample size and other methods mentioned earlier in the paper). |

| www.uoregon.edu /~mgall/statistical_significance_v.htm (3825 words) |