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Natasha_4902
#1 Posted : Wednesday, July 01, 2020 1:11:26 AM
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Hi,

For signal detection theory, wouldn't the ratio of the hit rate and the false alarm rate be a measure of specificity (too many false alarms-not specifying signal from noise well enough)? Also, wouldn't the ratio of the hit rate and the missed hits be a measure of sensitivity (how well you are able to detect the signal)? This would be the reverse to what the EK book says on page 120 so I am a bit confused.

Thank you
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INSTR_Ahmed_38
#2 Posted : Tuesday, July 07, 2020 5:01:36 PM
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Hi Natasha,
Specificity is thought of as the proportion of actual negatives that are correctly identified as such. So it is the ratio of true negatives / false positives.
Sensitivity is thought of as the proportion of actual positives that are correctly identified as such. So the ratio between true positives / false negatives.
Hope this helps,
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