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Fear Extinction Index (ERI) calculated from the differential SCRs during the first two trials of the CS + E minus the first two trials of the CS + U during the extinction memory recall test, Positive values indicate greater recall as measured by Skin Conductance Response (SCR) at post-treatment. The upper and lower “hinges” correspond to the first and third quartiles (the 25th and 75th percentiles) and lines correspond the median value. SCR1/2d: differential SCR.
