POSITIVE RESULTS BIAS:

Scientists, or authors of scientific reports are more likely to submit, and editors of medical journals accept, positive or statistically significant findings, instead of null results¹. Also see: Publication Bias, and the File Drawer Problem².

References:

1. Sackett DL. Bias in analytic research. J Chronic Dis. 1979;32 (1-2):51-63. (Link to Reference)

2. Rosenthal, R. (1979). The file drawer problem and tolerance for null results. Psychological Bulletin, 86(3), 638–641. (Link to Reference)