"Bias toward the null" means reduced power.
Sieberts
Solveig K
SK
Broman
Karl W
KW
Gudbjartsson
Daniel F
DF
D015982:Bias; D002874:Chromosome Mapping / Q000379:methods*; D003627:Data Interpretation, Statistical; D008957:Models, Genetic; D012107:Research Design; D035781:Siblings