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. Author manuscript; available in PMC: 2019 Apr 18.
Published in final edited form as: Curr Protoc Neurosci. 2017 Jan 3;78:9.56.1–9.56.18. doi: 10.1002/cpns.20

Table 9.56.2.

Explanation of the Signal Detection Variables SI and RI in Terms of Interpretation of Each Animal’s Behavior in the 5C-CPT

Sensitivity index (SI) Responsivity index (RI) Hit rate False alarm rate Explanation of performance
+1 0 1.0 0.0 Optimal: Accurate response to every target stimulus and inhibition of response to all non-target stimuli
0 +1 1.0 1.0 Chance level: Response to every stimulus (target and non-target)
0 −1 0.0 0.0 Chance level: Non-response to every stimulus (target and non-target)
−1 0 0.0 1.0 Rule reversed: Inhibition of response to all target stimuli and response to all non-target stimuli