TY - JOUR
T1 - Mental and Physical Countermeasures Reduce the Accuracy of the Concealed Knowledge Test
AU - Honts, Charles R.
AU - Devitt, Mary K.
AU - Winbush, Marcus
AU - Kircher, John C.
PY - 1996/1/1
Y1 - 1996/1/1
N2 - The effects of a physical (pressing the toes to the floor) and a mental (counting backward by sevens) countermeasure on the concealed knowledge test (CKT) were examined in a mock crime experiment with 40 subjects. Some knowledgeable subjects were informed about the nature of the CKT and were trained in the use of a countermeasure, whereas others remained uninformed. All subjects were offered a monetary reward if they could produce a truthful outcome. Subjects were tested using standard field techniques and instrumentation. The physical and, to a lesser extent, the mental countermeasures reduced the accuracy of the CKT. These results clearly demonstrate that the CKT has no special immunity to the effects of countermeasures.
AB - The effects of a physical (pressing the toes to the floor) and a mental (counting backward by sevens) countermeasure on the concealed knowledge test (CKT) were examined in a mock crime experiment with 40 subjects. Some knowledgeable subjects were informed about the nature of the CKT and were trained in the use of a countermeasure, whereas others remained uninformed. All subjects were offered a monetary reward if they could produce a truthful outcome. Subjects were tested using standard field techniques and instrumentation. The physical and, to a lesser extent, the mental countermeasures reduced the accuracy of the CKT. These results clearly demonstrate that the CKT has no special immunity to the effects of countermeasures.
KW - concealed knowledge test
KW - countermeasures
KW - guilty knowledge test
KW - lie detection
KW - statistical decision making
UR - https://scholarworks.boisestate.edu/psych_facpubs/69
UR - http://dx.doi.org/10.1111/j.1469-8986.1996.tb02111.x
M3 - Article
JO - Psychological Sciences Faculty Publications and Presentations
JF - Psychological Sciences Faculty Publications and Presentations
ER -