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How do people determine if they are hearing a faint sound or if they are hearing only background noise? How do people differentiate between important information and distractions? Signal detection theory was first developed as a model for understanding and interpreting electronic signals in early radar. The model was quickly adopted to explain people’s perception and sensation of light and sound.

Signal detection theory, with a …criterion or detection threshold that separates hits from misses and correct non-detections from false alarms… is a model for any decision-making setting that requires the decision maker to make a binary decision based on the presence or absence of the signal. Signal detection is explicitly understood and used in medical testing, fire detection, spam detectors, shoot/don’t shoot decisions by police and the military, psychophysics, artificial-intelligence algorithms, and in a variety of other settings.

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10 - Signal Detection Theory: How to Detect the Important Signal against the Distracting Background and Take Action as Appropriate Based on the Signal

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10 - Signal Detection Theory: How to Detect the Important Signal against the Distracting Background and Take Action as Appropriate Based on the Signal

Summary