Electrodermal Response Ratios: Scoring Against the Stronger of Two Comparison Questions in Search of an Optimal Minimum Threshold
Ładowanie...
Data wydania
2020
Autorzy
Tytuł czasopisma
ISSN
1898-5238
eISSN
2380-0550
Tytuł tomu
ISBN
eISBN
Wydawca
Oficyna Wydawnicza AFM
Abstrakt
Previously, Krapohl (2020) evaluated the Bigger-Is-Better Rule (BIBR) on the polygraph electrodermal
channel to assess whether there was a best minimum ratio between response sizes
for assigning a score. Performance peaked at a minimum ratio between 10% and 20%. The ratios
had been calculated by comparing the electrodermal responses for each relevant question against those of the immediately preceding comparison question. The analysis did not consider
whether the same optimal ratio would be found if the relevant question electrodermal responses
are compared to those of the stronger of two adjacent comparison questions. To investigate we
analyzed responses from an independent sample of 255 laboratory cases. The data from those
cases found the highest correlation between scores and ground truth occurred when the minimum
difference between two electrodermal responses was 30%.
Opis
Tematy
Słowa kluczowe
polygraph examination, electrodermal activity, galvanic skin response (GSR), electrodermal response (EDR), Bigger-Is-Better Rule (BIBR)
Źródło
European Polygraph 2020, nr 2, s. 9-16.