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VarietiesofInformationVisualization

ROCGraphsPSYC 6135,STEVENBAKER

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ConfusionMatrixActualState

Positive(Present) Negative(Absent)

TestClassificatio

n

Positive #True Positives

or“Hits”[sensitivity]

#False Positivesor“FalseAlarms”

Negative

#False Negativesor“Misses”

#True Negativesor“CorrectRejections”

[1-specificity]

Columntotal=P

tprate = 𝑇𝑃𝑃

Columntotal=N

fprate = 𝐹𝑃𝑁

3

The receiveroperatingcharacteristic (ROC)curve

Perfectclassification

4

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EverydayROC:TonometryThresholds

5

6Swets,J.A.,Dawes,R.M.,&Monahan,J.(2000).