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Table 7 Negative (NPP) and positive predictive power (PPP) at the base-rate of .577 which corresponds to the 57.7% instructed simulators in the present experiment

From: The effect of coaching on the simulated malingering of memory impairment

Variable

Cut-off

Specificity

Sensitivity

NPP

PPP

Trial 1

< 4

94

2.2

.4

.33

 

< 5

88

14.5

.33

.62

 

< 6

75

34.5

.23

.65

Trial 5

< 6

100

10

.41

1

 

< 8

94

17.7

.36

.8

 

< 10

83

38.9

.26

.75

Trial 1-5

< 21

100

1.1

.43

1

 

< 31

95

16.7

.37

.82

 

< 39

85

36.6

.27

.76

 

< 43

75

41.1

.22

.69

Interference list

< 4

95

10

.38

.73

 

< 5

88

33.4

.29

.79

Trial 6

< 5

95

20

.36

.84

 

< 7

86

36.7

.27

.78

Trial 7

< 2

95

3.7

.4

.5

 

< 7

86

43.3

.26

.8

Trial 6-5

< 1

95

15.5

.37

.81

 

< 2

88

41.1

.27

.82

Trial 7-5

< 0

95

8.9

.39

.70

 

< 2

81

25.6

.27

.64

Recognition

< 4

100

2.6

.43

1

 

< 8

95

13.4

.37

.78

 

< 12

86

42.2

.26

.8

Corrected recognition score

< 2

100

18.9

.39

1

 

< 6

95

28.9

.34

.89

 

< 11

41

61.1

.07

.58

3recallednotrecog

> 4

100

3.3

.43

1

 

> 1

86

50

.25

.83

VLMT number of times the first word was recalled in trials 1 to 5

< 2

100

5.5

.42

1

 

< 4

82

22.2

.29

.62

 

< 5

64

48.9

.16

.64

VLMT number of times the last word was recalled in trials 1 to 5

< 2

97

5.6

.41

.71

 

< 3

90

8.9

.36

.54

 

< 4

80

22.2

.28

.6

FIT recall

< 1

100

1.2

.43

1

 

< 4

91

13.3

.35

.66

 

< 9

85

30

.28

.73

FIT recognition

< 6

100

3.4

.43

1

 

< 10

94

15.6

.36

.78

 

< 12

88

33.3

.29

.79

FIT combination score

< 3

100

2.3

.43

1

 

< 15

94

13.4

.37

.75

 

< 18

85

25.7

.29

.70

 

< 22

79

37.8

.24

.71

BSV-STM correct responses

< 84

100

22.2

.38

1

 

< 95

95

55.6

.27

.94

 

< 98

64

81.1

.11

.75

BSV-STM RT

> 627

88

83.4

.18

.9

 

> 633

83

81.2

.17

.86

 

> 717

82

71.1

.19

.84

 

> 774

75

65.6

.17

.78

VLMT 1

< 43

95

26.8

.34

.88

 

< 57

88

43.6

.27

.83

COMB 1

< 43

100

10

.41

1

 

< 53

95

34.6

.32

.9

 

< 58

88

44.7

.27

.83

  1. Note: Sensitivity and specificity are computed from the combined values of the patients and best effort groups (specificity) and the combined values of all simulator groups (sensitivity).