Tsd203 model

The SCR was recorded through two Ag/AgCl electrodes (TSD203 Model; Biopac Systems, USA), filled with isotonic hyposaturated conductant attached to the distal phalanges of the second and third finger of participants’ left hand and held with Velcro straps. The SCR signal was continuously recorded at 200 Hz and amplified using a DC amplifier (Biopac GSR100; Biopac Systems, USA) with 5 μS/V gain factor and 10 Hz low pass filter. The analogue signal was digitalized using the MP-150 digital converter (Biopac Systems, USA) and fed into AcqKnowledge 3.9 software (Biopac Systems, USA).

The skin conductance response (SCR) was recorded with two Ag/AgCl electrodes (TSD203Model; Biopac Systems, USA), filled with isotonic hyposaturated conductant and attached to the distal phalanges of the second and the third finger of participants’ left hand. A DC amplifier (Biopac EDA100C) was used while recording the SCR. A gain factor was 5 μS/V and the low-pass filter was set at 10 Hz. The analog signal was then passed through a Biopac MP-150 digital converter at a 200 Hz rate. The signal was recorded with AcqKnowledge 3.9 (BIOPAC Systems, Inc., Goleta, California) and converted to microsiemens for offline analysis.

In the present study, signals were recorded with a Biopac MP‐150 system at 200 Hz sampling rate and fed into AcqKnowledge 3.9 software (BIOPAC Systems, Inc., Goleta, California, USA) for offline analysis. The SCR was acquired with two Ag/AgCl electrodes (TSD203 model; BIOPAC Systems) filled with isotonic hyposaturated conductant gel (GEL101 model; BIOPAC System), and attached to the distal phalanges of the second and third finger of the participant left hand. A Biopac EDA100C module was used to amplify the SCR signal (gain switch set to 5 μS/V, low pass to 35 Hz, high pass to DC). The ECG was acquired with three Ag/AgCl electrodes (EL503 model; BIOPAC Systems) filled with isotonic hyposaturated conductant gel (Lectron III Gel, NEUROSPEC). Electrodes were positioned in a modified bipolar lead I configuration, with the positive electrode placed on the participant's left wrist, the negative electrode on the right wrist, and the ground electrode attached just underneath the right clavicle. A Biopac ECG100C module was used to amplify ECG signals (gain switch set to 500, low pass to 35 Hz, high pass to 0.05 Hz).