Men smelled the most attractive wearing perfumes chosen by their sister, not by their romantic partner or themselves http://pec.sagepub.com/content/early/2016/12/07/0301006616682514.abstract?papetoc …pic.twitter.com/DKviu3Xh5F
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
But it's precisely the small sample sizes that make it impossible to discriminate between real effects and noise.
The greatest hindrance to reproducibility are questionable research practices, not small samples. With good science, small's well.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.