Group

PTSD2 symptoms (cutoff 17)

Reaction time (ms)

Hit rate

(%)

False alarm rate (%)

Sensitivity

Response bias β

Pre-earthquake orphans

High

402.0 ± 46.95

76.5 ± 22.84

5.0 ± 5.76

1.50 ± 1.08

1.28 ± 1.22

Low

389.2 ± 63.59

79.3 ± 22.67

4.4 ± 4.39

1.37 ± 0.91

0.95 ± 0.59

F

1.49

0.42

0.37

0.58

3.97

P

0.225

0.516

0.545

0.448

0.048

Post-earthquake orphans

High

384.8 ± 78.63

83.3 ± 20.96

4.1 ± 4.57

1.31 ± 0.89

1.07 ± 0.92

Low

401.7 ± 80.49

82.0 ± 21.28

4.0 ± 4.87

1.42 ± 0.79

1.35 ± 2.75

F

0.97

0.09

0.02

0.34

0.37

P

0.328

0.767

0.887

0.561

0.545

Non-orphans

High

378.5 ± 57.23

86.2 ± 18.13

2.1 ± 2.64

1.15 ± 0.67

0.93 ± 0.27

Low

381.8 ± 56.95

76.9 ± 27.35

4.9 ± 5.24

1.66 ± 1.05

1.13 ± 1.67

F

0.05

2.04

5.18

4.17

0.31

P

0.825

0.158

0.026

0.045

0.577