Fig. 2.

The power (top) and Type I error rates (bottom) of the four tests when ${\sigma }^2=0.05$ for different frequencies of the risk allele. ${\text{FBAT}}_{\text{true}}$, TDT using true genotypes; ${\text{FBAT}}_{\text{call}}$, TDT using complete trios; ${\text{FBAT}}_{\text{weight}}$, TDT using the weighting strategy; and ${\text{FBAT}}_{\text{LRT}}$, the likelihood ratio test that assumes genotype-specific call rates.