### Figure 13

Schematic illustrating the implementation of random-effect and
conjunction analyses for population inference. The lower right graph shows the probability *p*(*n*)
of obtaining a conjunction over *n*
subjects, conditional on a certain proportion *g*
of the population expressing the effect, for a test with specificity of a =
0.05, at several sensitivities (*b*
= 1, 0.9, 0.8 and 0.6). The broken lines
denote the critical specificity for population inference *a*_{c}
and the associated proportion of the population *g*_{c}.