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L09 EDA & Polygraph

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Electrodermal Activity (EDA)/ Galvanic skin response (GSR) & the Polygraph

This BSL lesson demonstrates a number of important autonomic concepts and is a great introduction to EDA (a.k.a. GSR).

Students record the standard physiological measures of a polygraph and examine the effects of cognitive behavior and emotion. Students record changes in respiratory rate, heart rate and skin resistance. Each Subject answers a number of simple questions and watches a presentation to stimulate a response. It is possible to use a variety of different stimuli for the lesson.

The lesson is extremely flexible and allows the instructor to look at a variety of autonomic principles.

Experimental Objectives

  1. To become familiar with procedures for recording electrodermal activity.

  2. To observe and record the changes in respiratory rate, heart rate, and skin resistance associated with somatic and special sensory stimuli.

  3. To observe and record changes in respiratory rate, heart rate , and skin resistance associated with cognitive behavior and emotion.

  4. To analyze a 3-channel polygraph recording under various experimental conditions to gain a better understanding of polygraphy and its potential for use and misuse.

Tasks Performed by the Student

BSL Lessons are designed to allow at least four students to record and save data in a normal lab period (60-90 minutes). Typically, labs work most efficiently with three or more students working together at each BSL station.

Videos

BSL L09 Recording

BSL L09 Calibration

Biopac Student Lab Student Download

Lesson Hardware

This lesson requires a Biopac Student Lab (BSL) System and the following hardware. If your BSL System does not include all hardware items, expand your system by selecting required items below. For more details, review the Lesson: L# BSL Lessons - see the Lab Manual or launch BSL; A# and H# BSL PRO Lessons, click the PDF link above to review full setup, recording, and analysis procedures.

Item Name Cart
EL503 Disp. Gen-purp electrode 100/pk Add to Cart
SS2LB Lead set, shielded, BSL Add to Cart
Select Option EDA Lead Set Add to Cart
EL507 Disp. EDA Electrode 100/pk Add to Cart
GEL1 Electrode gel 50 g Add to Cart
GEL101 Electrode Gel, Isotonic, 114 g Add to Cart
ELPAD Abrasive Pads 10/pk Add to Cart
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Fundamentals of Physiological Data Recording

Basic principles of physiological data collection covers fundamentals of data collection and equipment configuration equipment to help you refine experiment protocols and avoid costly missteps. Frazer Findlay, CEO of BIOPAC, discusses common mistakes with physiology recording and shares his secrets for collecting great data. Topics include: How to prep a subject and where to place electrodes; Which type of electrodes work for different body signals; Analog to Digital Conversion; Sample rates (correct vs. incorrect); Filtering; and Scaling and calibration.
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