Summary:  Statistical significance helps establish whether a result is reliable, while practical significance helps determine whether it is worth acting on. When you run a quantitative usability study or analyze a survey, it’s tempting to get excited when a result is statistically significant. But before you celebrate, pause: statistical significance doesn’t automatically mean the result matters in practice. In UX research, what’s statistically significant might not be meaningful to users, product teams, or business outcomes. What Is Statistical Significance? Statistical Significance May Not Matter What Is Practical Significance? The Role of Sample Size How to Evaluate Practical Significance Combining Both Perspectives What Is Statistical Significance? Statistical significance answers the question: Is this result likely due to chance? Statistical significance means that a result is unlikely to have occurred by chance.…