I need to come up with an idea for a research proposal. At first i was going to go with the effects of ADHD drugs on anxiety (testing to see if it increases anxiety and therefore seeing if it is counterproductive for students to abuse them when studying). But I found it a little cliched. Any other ideas? It has to be drug-related.

i need help coming up with some variables for my research methods class and we need to do a research proposal. we need at least 3 variables. i’m interested in working with romantic relationships, so i thought of the variables "romantic attachment" and "personality", but idk what my 3rd one should be. once i get an idea for the 3rd variable, i can form those variables into a question of what i need to find out for my proposal. anyone have any ideas of what my 3rd variable should be? or any other relationship type research proposal ideas? please help