Ml116 gsr amp

Manufactured by ADInstruments

The ML116 GSR Amp is a laboratory equipment designed to measure and record galvanic skin response (GSR) signals. It is a compact and versatile device that can be used in a variety of research and clinical applications.

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Lab products found in correlation

Powerlab 26t, by ADInstruments (1 mentions)

4 protocols using ml116 gsr amp

Event-Related Electrodermal Activity Measurement

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Event-related EDA was recorded, in microsiemens (μS), continuously for the entire duration of the task (at 75 kHz sampling rate using an electrodermal recording unit: ML116 GSR Amp and PowerLab 26T, ADInstruments). Task-relevant events were simultaneously encoded during EDA recording. The electrodes were connected to the palmar surface of the index and ring fingers of the non-dominant hand, and participants were informed to keep this hand stationary during testing.
Amplitude of phasic activity was measured as the difference between the maximum and minimum value of the EDA waveform within an event-related epoch (Wolfram, 2012 ). Within this study, two epochs were used: a post-feedback epoch [response selection onward (4 s)], to examine changes in arousal level after the awareness of trial outcome, and a pre-feedback epoch [From the start cue to response feedback onset (2.4 s window)], to examine changes in arousal level before feedback.

Fehring D.J., Samandra R., Rosa M.G, & Mansouri F.A. (2019). Negative Emotional Stimuli Enhance Conflict Resolution Without Altering Arousal. Frontiers in Human Neuroscience, 13, 282.

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Electrodermal Activity in Target Detection

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While human participants performed the TDT, we recorded their event‐related electrodermal activity (EDA), a measure of skin conductance in microsiemens (μS). Two surface electrodes were attached to participants' non‐dominant ring and index fingers, which were connected to an electrodermal recording amplifier (ML116 GSR Amp, ADInstruments) sampling at a rate of 75 kHz. As EDA recording is sensitive to motion‐related noise, we instructed participants to keep their non‐dominant hand and arm still throughout their testing sessions. We calculated event‐related EDA as the difference between the minimum and maximum values of phasic activity within a 3‐s epoch following target selection.
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⁴⁶ (link) Due to several factors outside of experimental control, such as cold hands and low sweating levels, EDA could not be adequately recorded from two participants. Data from these two participants were chosen for exclusion based on the decision of an observer who was blinded to the data analysis. Consequently, we included EDA data from 53 human participants in total within our analysis.

Ghasemian S., Pascoe A.J., Vardanjani M.M., Haque Z.Z., Ignatavicius A., Fehring D.J., Sheibani V, & Mansouri F.A. (2024). Morphine exposure modulates dimensional bias and set formation in anthropoids. Addiction Biology, 29(2), e13380.

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Measuring Event-Related Electrodermal Activity

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We recorded human participants’ electrodermal activity (EDA), a measurement of skin conductance in microsiemens (μS), whilst they performed the DMS. To measure the event-related changes in EDA in real-time, the electrodermal recording unit software (ML116 GSR Amp, ADInstruments) was employed at a sampling rate of 75 kHz^{47 (link),48 (link)}. Two electrodes were attached to the index and ring fingers of the participants’ non-dominant hand to measure skin conductance. Since the electrodes are sensitive to movement-related noise, participants were advised to keep their hand still. We calculated the difference between the minimum and maximum amplitudes of the phasic activity for each event-related electrodermal signal within a 3 s time epoch following target selection^{47 (link),49}. However, due to various factors that included motion artefacts, cold hands, and low sweating levels, EDA readings were not adequately recorded for three participants. Two observers blinded to the data analyses assessed the quality of recorded EDA for exclusion of unreliable data. Therefore, EDA data obtained from 31 participants were used in EDA data analysis.

Fehring D.J., Pascoe A.J., Haque Z.Z., Samandra R., Yokoo S., Abe H., Rosa M.G., Tanaka K., Yamamori T, & Mansouri F.A. (2022). Dimension of visual information interacts with working memory in monkeys and humans. Scientific Reports, 12, 5335.

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Measuring Cognitive Task-Induced Electrodermal Activity

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Electrodermal activity (EDA) was measured by an electrodermal recording unit (ML116 GSR Amp- ADInstruments). The EDA amplifier (sampling rate of 75 kHz) was attached to PowerLab (26 T) recording units for monitoring and storage of data. During cognitive task performance skin conductance was continuously recorded by two metal electrodes attached to the palmar surface of the index and ring fingers of the non-dominant hand. The participants were instructed to avoid moving their non-dominant hand and keep it on a pad over the desk. Conductivity measurement was displayed in Standard International conductance units (microsiemens). EDA was monitored in real time and event codes were automatically included through the behavioral control software (CORTEX) for assessing the event-related phasic changes in the EDA signal. Amplitude of phasic activity was measured as the difference between the maximum and minimum value of the EDA waveform within a 3 second window following each event⁵¹ (Fig. 3a inset). In 5 participants the EDA response could not be reliably recorded in all sessions (due to factors such as motion artefact, cold hand, very low or very high levels of sweating) and therefore their data were excluded from the analyses (two observers blind to the analyses results assessed the EDA records in each participant and decided about inclusion or exclusion of data).

Mansouri F.A., Acevedo N., Illipparampil R., Fehring D.J., Fitzgerald P.B, & Jaberzadeh S. (2017). Interactive effects of music and prefrontal cortex stimulation in modulating response inhibition. Scientific Reports, 7, 18096.

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