Signal Detection Theory (SDT)
Psychophysics framework that separately estimates a binary judge's discriminability (d′) and decision threshold (c).
Also known as: SDT
Signal detection theory (Green & Swets 1966) cleanly separates a binary judge's discriminability (, d′) from their decision threshold (, criterion c). From hit rate and false-alarm rate :
An appraiser with a high miss rate and low false-alarm rate can still be highly discriminating — they simply have a liberal threshold. SDT reveals this decomposition.
See also
Used in
In the Algorithm Lab
Sources
- Green, D.M. & Swets, J.A. (1966). Signal Detection Theory and Psychophysics. Wiley.
- Hautus, M.J. (1995). Corrections for extreme proportions and their biasing effects on estimated values of d′. Behavior Research Methods, Instruments, & Computers, 27(1), 46–51.