Download Physiological data - Hocheol

Analyzing physiological
data
Hocheol Yang
Doctoral student
School of Media and Communication
Temple University
Types of physiological data
From brain to heart
Language
Types of physiological data
• ElectroDermal Activity: EDA
Skin conductance level (SCL), The change in SCL can be
expressed in either absolute microsiemens units or as the
slope of change overtime
• Heart rate: ECG
Electrocardigram (ECG), the number of beats occurring per
minute and is recorded with an electrocardigram
• ElectroEncephalography: EEG
This technique uses at least two and sometimes up to 256
electrodes to measure the difference in electrical charge
(the voltage) between pairs of points on the head.
Types of physiological data
ElectroDermal Activity: EDA
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EDA Electrodermal Activity
EDL Electrodermal Level
EDR Electrodermal Response
SCL(GSR) Skin Conductance Level
SCR Skin Conductance Response
SRL Skin Resistance Level
SRR Skin Resistance Response
SPL Skin Potential Level
SPR Skin Potential Response
Types of physiological data
ElectroDermal Activity: EDA
EDA (also known as the SCL) generates a constantly moving
baseline. In other words, the background Tonic SCL is constantly
changing within an individual, and can differ markedly between
them. This has led some researchers to conclude that the actual
SCL level is not, on its own, that informative or even
that easy to derive (Boucsein, 2012).
Types of physiological data
ElectroDermal Activity: EDA
Types of physiological data
ElectroDermal Activity: EDA
• SCL(GSR) Skin Conductance Level
Tonic(SCL): Generally considered to be the level of skin conductance in
the absence of any particular discrete environmental event or external
stimuli. This slow-changing level is generally referred to as Skin
Conductance Level.
Phasic(SCRs): Phasic skin conductance measurements are typically
associated with short-term events and occur in the presence of discrete
environmental stimuli (sight, sound, smell, cognitive processes that
precede an event such as anticipation, decision making, etc).
Types of physiological data
ElectroEncephalography: EEG
Types of physiological data
ElectroEncephalography: EEG
The 10/20 system
or International 10/20
system is an internationally
recognized method to
describe the location of scalp
electrodes
Types of physiological data
ElectroEncephalography: EEG
The 10/20 system
or International 10/20
system is an internationally
recognized method to
describe the location of scalp
electrodes
Types of physiological data
ElectroEncephalography: EEG
The 10/20 system
or International 10/20
system is an internationally
recognized method to
describe the location of scalp
electrodes
Types of physiological data
How to measure?
From analog to digital
Post processing
From analog to digital
Sources
• http://www.cairn.info/revue-de-neuropsychologie-2015-4-page-237.htm
• http://www.nature.com/nbt/journal/v33/n5/fig_tab/nbt.3222_F1.html
• http://hmi.ewi.utwente.nl/verslagen/capita-selecta/CS-HoekstraArjen+Janssen-Joris.pdf
• http://hmi.ewi.utwente.nl/verslagen/capita-selecta/CS-HoekstraArjen+Janssen-Joris.pdf
• http://vismod.media.mit.edu/tech-reports/TR-483/node6.html
• http://onlinelibrary.wiley.com/doi/10.1111/j.14698986.2012.01384.x/epdf
• http://www.biopac.com/eda-scr-event-related-analysis-tutorial-andprimer-available/
• http://www.birmingham.ac.uk/Documents/collegeles/psych/saal/guide-electrodermal-activity.pdf