Table 4 Results of the first item-selection phase using CTT and IRT

PHD1

1.464

0.752

0.784

0.705

0.908

0.88

−1.67

−0.37

0.09

1.72

√

PHD2

1.423

0.706

0.763

0.712

0.906

1.13

−1.85

−0.39

−0.12

1.16

√

PHD3

1.446

0.799

0.811

0.77

0.900

1.30

−1.44

−0.78

−0.32

0.36

√

PHD4

1.355

0.734

0.822

0.739

0.903

1.26

−1.16

−0.10

0.61

1.97

√

PHD5

1.320

0.845

0.799

0.825

0.894

1.59

−1.78

−0.71

−0.34

0.25

√

PHD6

1.246

0.811

0.758

0.768

0.901

1.29

−2.20

−0.93

−0.22

0.77

√

PHD7

1.213

0.722

0.743

0.689

0.908

1.57

−1.90

−0.72

0.03

0.98

√

PHD8

1.439

0.781

0.835

0.628

0.869

0.53

−3.23

−1.31

−0.32

1.77

X

PHD9

1.325

0.777

0.818

0.697

0.836

1.18

−1.98

−0.70

−0.10

1.05

√

PHD10

1.266

0.801

0.802

0.777

0.804

1.29

−1.71

−0.97

−0.49

0.95

√

PHD11

1.214

0.745

0.813

0.779

0.806

1.63

−1.89

−0.89

−0.37

0.49

√

PHD12

1.395

0.473

0.657

0.515

0.694

1.37

−1.62

−0.58

−0.38

0.50

√

PHD13

1.310

0.514

0.664

0.584

0.659

1.15

−1.89

−1.11

−0.53

0.61

√

PHD14

1.520

0.489

0.793

0.478

0.718

0.29

−4.94

−2.28

−0.60

2.39

√

PHD15

1.471

0.549

0.748

0.573

0.661

0.30

−5.24

−4.20

−2.91

0.52

√

PHD16

1.582

0.786

0.739

0.634

0.789

0.47

−2.40

−1.77

−1.07

1.19

√

PHD17

1.500

0.779

0.740

0.676

0.782

0.37

−3.83

−2.92

−1.87

0.97

√

PHD18

0.930

0.081

0.405

0.208

0.843

0.90

−4.18

−2.86

−2.25

−1.15

X

PHD19

1.535

0.262

0.495

0.299

0.843

0.74

−2.40

−0.3

0.13

1.01

X

PHD20

1.756

0.709

0.789

0.643

0.787

0.87

−0.31

0.16

0.47

1.27

√

PHD21

1.654

0.815

0.786

0.736

0.769

0.70

−1.28

−0.76

−0.30

0.93

√

PHD22

1.566

0.865

0.785

0.753

0.767

0.72

−1.69

−1.01

−0.48

0.87

√

PSD1

1.387

0.718

0.769

0.66

0.828

1.00

−1.64

−0.29

0.24

0.94

√

PSD2

1.413

0.784

0.735

0.584

0.840

1.00

−1.41

−0.11

0.32

2.03

√

PSD3

1.370

0.641

0.761

0.626

0.833

1.43

−1.34

−0.16

0.15

1.49

√

PSD4

1.264

0.679

0.750

0.704

0.822

1.76

−1.60

−0.63

−0.26

0.85

√

PSD5

1.237

0.407

0.565

0.474

0.854

1.85

−1.35

−0.73

−0.35

0.87

X

PSD6

1.319

0.566

0.697

0.592

0.838

1.58

−1.38

−0.12

0.23

1.65

√

PSD7

1.230

0.595

0.706

0.696

0.824

1.80

−1.37

−0.63

−0.18

1.15

√

PSD8

1.317

0.652

0.511

0.439

0.902

0.99

−2.09

−1.10

−0.60

1.06

X

PSD9

1.022

0.727

0.614

0.502

0.893

1.11

−3.83

−1.93

−1.30

−0.05

X

PSD10

1.183

0.648

0.692

0.695

0.876

1.71

−1.83

−0.85

−0.60

0.65

√

PSD11

1.106

0.600

0.640

0.651

0.881

1.68

−2.15

−1.15

−0.62

0.70

√

PSD12

1.198

0.816

0.853

0.795

0.866

2.33

−1.51

−0.76

−0.19

0.83

√

PSD13

1.271

0.791

0.778

0.755

0.870

2.90

−1.32

−0.30

0.05

0.87

√

PSD14

1.288

0.845

0.810

0.777

0.868

2.43

−1.57

−0.60

−0.18

0.48

√

PSD15

1.200

0.820

0.776

0.766

0.869

2.80

−1.45

−0.72

−0.17

0.58

√

PSD16

1.128

0.551

0.724

0.609

0.645

1.91

−2.35

−0.99

−0.35

0.50

√

PSD17

1.215

0.589

0.706

0.632

0.631

1.86

−1.71

−0.87

−0.44

0.62

√

PSD18

1.321

0.441

0.721

0.472

0.695

1.13

−2.43

−0.77

−0.30

0.85

√

PSD19

1.222

0.515

0.655

0.485

0.689

1.61

−1.60

−1.02

−0.59

0.60

√

PSD20

1.310

0.325

0.528

0.305

0.759

0.73

−3.44

−1.53

−1.08

0.63

X

SOD1

1.403

0.658

0.578

0.382

0.776

0.72

−1.68

−0.04

1.14

2.59

X

SOD2

1.495

0.221

0.594

0.327

0.797

0.86

−1.86

−0.71

0.10

1.06

X

SOD3

1.502

0.632

0.761

0.580

0.709

1.07

−1.58

−0.34

0.35

1.04

√

SOD4

1.384

0.728

0.869

0.751

0.649

1.56

−1.47

−0.36

0.16

0.97

√

SOD5

1.365

0.651

0.800

0.701

0.669

1.88

−1.55

−0.45

0.01

0.62

√

SOD6

1.608

0.835

0.867

0.614

0.694

0.20

−4.51

−3.13

−2.34

3.21

√

SOD7

1.205

0.695

0.705

0.573

0.718

0.37

−6.67

−3.95

−3.14

1.58

√

SOD8

1.589

0.765

0.849

0.612

0.694

0.27

−3.91

−2.27

−1.66

2.69

√

SOD9

1.114

0.619

0.610

0.526

0.742

0.50

−5.02

−4.03

−2.72

1.34

√

THD1

0.961

0.362

0.650

0.304

0.451

0.39

−8.45

−6.33

−4.91

−0.72

X

THD 2

1.348

0.512

0.772

0.413

0.232

0.38

−6.18

−3.55

−1.78

−0.47

X

THD3

1.438

0.500

0.743

0.277

0.501

0.38

−5.01

−0.74

0.64

2.52

X

THD 4

1.265

0.585

0.694

0.495

0.835

0.37

−6.29

−3.13

−1.75

2.30

√

THD 5

1.090

0.741

0.753

0.643

0.807

0.56

−5.18

−3.67

−1.61

1.13

√

THD 6

1.299

0.732

0.785

0.662

0.801

0.55

−4.09

−2.25

−0.90

1.30

√

THD 7

1.440

0.716

0.751

0.574

0.823

0.33

−4.23

−0.36

1.31

4.26

√

THD 8

1.111

0.833

0.804

0.728

0.792

0.45

−8.11

−3.77

−1.71

1.14

√

THD 9

1.242

0.748

0.745

0.619

0.810

0.62

−3.61

−2.49

−1.06

1.23

√