Clear and succinctly explain how you will conduct your investigation. Explain whether it is an experiment or observational study. Explain how you will collect and/or manipulate variables. Don't include more than two time points for repeated measures and don't look at too many outcome variables. Keep in mind you need to present this on one poster at the end of the semester! Your proposal should have enough detail for me to be able to replicate the same study. If I have to ask questions about what you're planning, then you haven't provided the right detail