The Lafayette Instrument Company denies in a letter to customers also published on its website that any problem exists, averring "There is nothing wrong with the LX4000":
https://www.lafayettepolygraph.com/email/eda-response/ RESPONSE TO RECENT ARTICLES PUBLISHED ONLINE MAY 22, 2013
Dear Colleagues,
More than two months ago, Lafayette Instrument Company received questions from a journalist regarding our EDA (electrodermal activity sensor), our LX4000 polygraph system, and our business practices. We were not obligated to respond to the questions, but we did respond hoping that we could improve the quality and integrity of the subsequent article. In that regard, we were unsuccessful. On or around May 20, 2013, a series of articles were published online and we feel these articles selectively ignored extensive amounts of data that we provided to the lead journalist.
The complete set of questions, and our responses, can be found here:
http://www.lafayettepolygraph.com/eda-questions.pdf Additionally, we provided a shorter EDA document to our customers and partners in March (2013):
http://www.lafayettepolygraph.com/eda-info.asp To summarize:
There is nothing wrong with the LX4000. Implications in the news media regarding LX4000 problems are based in misinformation. We are continuously engaged in research and development to improve all of our products and we are certain that the LX4000 and LX5000 devices represent the best technology available to the profession. The EDA phenomena referenced in the article involves the potential for occasional tracing variations between Manual and Auto EDA; this is a known phenomenon that is documented in psychophysiology literature, and is not unique to devices from Lafayette Instrument. It was irresponsible and misleading to alarm people by labeling a known phenomenon, a “glitch” It was similarly confusing to misuse the term “skew” in an unscientific way. All EDA modes have their advantages and disadvantages. LIC has taken the approach of helping customers evaluate these advantages and select the EDA mode that best meets their needs.
We stand by our products and we will work with you to quickly resolve issues or address further questions as needed.
For more information, or to get to know us better, please contact
Terry Echard
President and General Manager
terry@lafayetteinstrument.com
Chris Fausett
Vice President and
Polygraph Product Manager
chris@lafayetteinstrument.com
Jennifer Rider
Vice President and CIO
jennifer@lafayetteinstrument.com
Lafayette Instrument Company, Inc. PO Box 5729 Lafayette, IN 47903 Tel: (765) 423-1505 info@lafayetteinstrument.com