Design a detailed experimental study to examine the relationship between sleep quality and cognitive performance. Develop a clear research question, formulate a hypothesis, and describe the experimental design, including the independent and dependent variables. Calculate the sample size needed for your study, outline the statistical analysis plan, and address potential confounding factors, providing examples of how to apply these steps to your research question. Include instructions for data collection, following scientifically validated protocols, and create a promotion draft for participant recruitment. Consider incorporating day-to-day performance boosters in your study and avoid AI-related solutions. Reflect on problems reported by people worldwide and suggest novel ideas for improving cognitive performance through sleep.