BIOPAC® Systems, Inc. Logo

Electrodermal Activity (EDA) Scoring

EDA

Record and analyze EDA/GSR data wirelessly with BioNomadix or with standard wired amplifiers. AcqKnowledge includes a fully automated scoring system for electrodermal activity (EDA) data. The feature includes options for deriving phasic EDA from tonic EDA, locating skin conductance responses (SCR), and event-related EDA analysis. In the SCR location mode the software will mark the event onset, SCR point of max response, and waveform end. The waveform onset and waveform end markers identify when the threshold was crossed. The user can also manually adjust any scored response through the event marking scheme. Export the complete analysis results into a Journal file or Excel spreadsheet.

Preferences for the software allow the user to select:

See More...

Details

This is one of many ADVANCED FEATURES for the selected Application. Scroll down for hardware options.

Learn more about EDA


The event-related EDA analysis works in conjunction with the Digital input to stim events feature. The Digital input to stim events function works with TTL trigger information coming from applications such as Superlab®, E-Prime®, DirectRT®, MediaLab®, Inquisit®, and Presentation®. It converts TTL data acquired on the digital channels of an MP device into stimulus events. Stimulus delivery events are defined in the graph for each low to high transition of the digital data, the indications of stimulus delivery. The digital channels are interpreted as a binary number. Each stimulus event placed into the graph has the corresponding number included with its label.The event-related EDA tool locates the stimulus events and looks for a SCR that falls within a time window, after the stimulus was presented to the subject.

The following measures are extracted from the data.

Name Abbrev. Description Units
Stimulus Delivery Time Stim Time The time within the recording where the stimulus delivery event was located. seconds
Skin Conductance Level SCL Amplitude of the tonic EDA signal at the time when the stimulus was delivered. umho
Response latency Latency Time separating the stimulus delivery from the onset time of the corresponding SCR. This latency will always be less than the maximum allowable latency specified as a parameter for the analysis. seconds
SCR Amplitude SCR Amplitude Height of the corresponding SCR as determined by the change in the tonic EDA from the time of SCR onset to the maximum tonic EDA amplitude achieved during the SCA: |EDA(tmax)-EDA(tonset)|
SCR rise time SCR Rise Time Time taken for the tonic EDA to reach its maximum value within the SCR: tmax-tonset seconds

Videos

Support

Application Notes

Knowledge Base

Hardware Packages   |   Electrodermal Activity (EDA) Scoring

Hardware Bundles are complete solutions for the specified application. Choose your preferred platform and bundle, then click "Request Pricing" to request an estimate, add/remove items, or complete purchase. If you have questions about specific items, click through to the product web page for details and specifications, or contact your Local Sales contact.

Wired

Wireless

MRI

Animal

Spotlight On
StimTracker Event Marking

StimTracker Stimulus Presentation Marker Interface – USB

StimTracker Duo. StimTracker Quad MARK. SYNC. AUDIT. StimTracker Duo and Quad autonomously  detect the onset of events to avoid operating system delays. The Quad adds direct TTL output, support for vocal response onset (voice key), more light sensors, and the option to install a Raspberry Pi board. Onset of Auditory Stimuli – Pass the audio via StimTracker, set […]

View All
Latest News

New Citations | Stimulation and Mental Processing

Recent developments regarding electric stimulation and mental processing have lead to interesting developments in psychophysiology and physiological sciences. The following studies look at developments in how we potentially care for and understand solutions to issues with mental health, as well as new ways to monitor electrical stimulus on participants. The ventromedial prefrontal cortex (vmPFC) is […]

Alan Macy Honored as Local Hero

“Alan Macy: Scientist, Entrepreneur, and Visionary Community Builder” The Santa Barbara Independent honored Alan Macy as a Local Hero. “What makes Macy a Santa Barbara Independent Local Hero is the combination of vision, generosity, and persistence he has shown in bringing creative people together and in crafting innovative venues for them to collaborate. …For this, and for his […]

Read All
Request a Demonstration
Request a Demonstration