But when it came to publication, 63 percent of the bilingual boosting studies made it into a scientific journal, as opposed to 36 percent of the studies with null findings. (scientificamerican.com)
I'm not aware of any research that has tested the «bullying causes suicide» hypothesis that has returned null findings. (cyberbullying.org)
Our findings are in accordance with some observations from previous studies showing a positive association between long working hours and depression [12] but contrast with other reports of null findings [12]--[14]. (journals.plos.org)