Great job purrin with the study, it has value and actually your sample size was for the most part suitable. Once you have 30 participants the central limits theorem comes into play and you can assume the population was normally distributed. Just being picky here, but because you had a sample it is actually the standard error of the mean, not the standard deviation which is a population statistic, but I suspect you know that. I really liked that you tried this, and I think designing a more robust study would actually be a great thing. I would love to work on such a study for use as a thesis paper I need to do soon, but it has bearing on my career area so sadly I will have to study something else. Really interesting line of questioning so keep it up if you can.