I am undertaking a project to investigate the relationship between people's personalities and their sleep patterns. It is pretty brief, and at the end there is the option to see the descriptive results (percentages of each response to see how you stack up to your fellow MBTI enthusiasts). Once I have a sufficient number of participants, I will analyze the data to find correlations between different traits, and then post any interesting findings from the data.
So far the survey has accumulated more than 1,300 participants, but unfortunately only about 35 of them are Extraverted Senstates (ESTJs, ESFJs, ESTPs, and ESFPs)! We especially need ESs before we can wrap up data collection, but all types are welcome.
Thanks for your time!