Home About Us Laboratory Services Forensic Science Communications Back Issues October 1999 The Finapres (Volume Clamp) Recording Method in...
Info
This is archived material from the Federal Bureau of Investigation (FBI) website. It may contain outdated information and links may no longer function.

The Finapres (Volume Clamp) Recording Method in Psychophysiological Detection of Deception Examinations: Table 1 (Forensic Science Communications, October 1999)

fsc_logo_top.jpg
fsc_logo_left.jpg

October 1999 - Volume 1 - Number 3

The Finapres (Volume Clamp) Recording Method in Psychophysiological Detection of Deception Examinations: Experimental Comparison With the Cardiograph Method

Table 1:

Descriptive Statistics and Point-Biserial Correlations With Role

 

  Standardized
Difference Scores
 
InnocentGuilty
MeasureMeanSDMeanSDrpb
Finapres Group  
Skin Conductance Amplitude   .67*

.80  

  -.46*

.49

  .66*
Respiration Excursion   .45*

.75  

  -.26*

.39

  .52*
Finapres Amplitude   .49*

.92  

  -.31*

.50

  .49*
Finapres Pulse Amplitude   .66*

1.17  

  -.37*

.67

  .48*
Heart Period Amplitude   .34

.86  

  -.11

.63

  .30
n

20

20

 
 
Cardiograph Group  
Skin Conductance Amplitude   .34*

.70

  -.49*

.71

  .51*
Respiration Excursion   .08

.58

  -.46*

.61

  .42*
Cardiograph Amplitude   .44*

.52

  -.30*

.63

  .55*
Cardiograph Pulse Amplitude   .42*

.45

  -.09

.59

  .44*
Heart Period Amplitude   .30*

.59

  -.27

.61

  .43* 
n

20

20

 
 
Finapres/Cardiograph Group  
Skin Conductance Amplitude   .51*

1.01 

  -.44*

.48

  .53*
Respiration Excursion   .51*

.69 

  -.33*

.52

  .58*
Finapres Amplitude   .28

.84 

  -.32*

.61

  .39*
Cardiograph Amplitude   .25

.94 

  -.22

.60

  .29
Finapres Pulse Amplitude   .30

1.16 

  -.53*

.64

  .41*
Cardiograph Pulse Amplitude   .26

1.07 

  -.30*

.54

  .31*
Heart Period Amplitude   .35*

.56 

  -.38

.92

  .44*
n

20

20

 

The rpbs are Pearson product moment correlations of the measures with Role. The difference score means were compared with 0.00 using two-tailed t tests. The value of 0.00 represents a difference of 0.00 between the mean relevant and control-question responses. Significant negative means indicate that the relevant-question responses were larger than the control-question responses; significant positive means indicate the reverse. SD = standard deviation.

* p < .05.

Back to the article