Statistical Decision Theory in Perception and Cognition: Signal Detection and General ...
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Signal Detection Theory is the hidden engine behind how brains separate real signals from noise — and this deep dive reveals why it still dominates cognitive science decades later.
Signal Detection TheoryGeneral Recognition TheoryBayesian Decision TheoryPsychophysics
Theory Briefing
- Signal Detection Theory (SDT) quantifies how humans distinguish real stimuli from background noise, revealing the math behind everyday perception.
- General Recognition Theory (GRT) extends SDT into multiple dimensions, modeling how the brain simultaneously processes complex, overlapping sensory inputs.
- Together, SDT and GRT remain the dominant frameworks in cognitive science, showing that perception is fundamentally a statistical decision-making process.