The goal of signal detection theory is to estimate two main parameters
from the experimental data. The first parameter, called d
0
, indicates the
strength of the signal (relative to the noise). The second parameter called
C (a variant of it is called β), reflects the strategy of response of the participant
of being more willing to say (e.g., yes rather than no). Sdt is used
in very different domains from psychology (psychophysics, perception, memory),
medical diagnostics (do the symptoms match a known diagnostic or can
they be dismissed are irrelevant), to statistical decision (do the data indicate
that the experiment has an effect or not).