A 200-ms shock was delivered to the right wrist using pre-gelled snap electrodes (BIOPAC EL508) connected to a Grass Medical Instruments stimulator (West Warwick, Rhode Island). SCR electrodes we replaced on the hypothenar eminence of the palmar surface of the left hand using pre-gelled snap electrodes (BIOPAC EL509). Data were collected using a BIOPAC MP-100 System (Goleta, CA), and responses calculated using established criteria23 (link),24 (link). In brief, an SCR was considered related to CS presentation if the trough-to-peak deflection occurred 0.5–4.5 s following CS onset, lasted between 0.5 and 5.0 s, and was greater than 0.02 microsiemens (μS). Responses that did not fit these criteria were scored as zero. SCR values were obtained using a custom Matlab (The MathWorks, Inc.) script that extracted SCRs for each trial using the above criteria25 (link).
Protocol detail
Skin Conductance Response Measurement Protocol
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Variable analysis
independent variables
- Shock delivery to the right wrist (200-ms duration)
- Skin conductance response (SCR)
- Pre-gelled snap electrodes (BIOPAC EL508) used for shock delivery
- SCR electrodes placed on the hypothenar eminence of the palmar surface of the left hand using pre-gelled snap electrodes (BIOPAC EL509)
- Data collected using a BIOPAC MP-100 System (Goleta, CA)
- SCR responses calculated using established criteria from previous studies (references 23, 24, and 25)
- Not explicitly mentioned
- Not explicitly mentioned
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