Item

Extreme group comparison

Total correlation

Homogeneity test

Remarks

Decision value

The item related to the total score

Corrected item and total relevance

The alpha value after the item is deleted

Commonality

Factor load

T1

3.307*

#0.359**

#0.246

0.808

#0.061

#0.246

delete

T2

6.267*

0.494**

0.457

0.828

0.311

0.558

retain

T3

5.113*

0.460**

#0.322

0.804

#0.118

#0.344

delete

T4

3.075*

#0.376**

#0.238

0.809

#0.052

#0.229

delete

T5

6.138*

0.493**

0.500

0.823

0.383

0.618

retain

T6

5.307*

0.494**

0.526

0.820

0.408

0.639

retain

T7

3.526*

0.423**

0.560

0.817

0.481

0.694

retain

T8

4.628*

0.403**

0.569

0.819

0.485

0.696

retain

T9

5.827*

0.490**

0.548

0.818

0.462

0.679

retain

T10

#2.734*

#0.312**

#0.174

0.814

#0.041

#0.202

delete

T11

7.667*

0.629**

0.600

0.813

0.475

0.689

retain

T12

6.716*

0.464**

#0.364

0.801

#0.143

#0.378

delete

T13

8.846*

0.551**

0.459

0.794

#0.174

#0.417

delete

T14

6.375*

0.503**

0.414

0.798

#0.114

#0.338

delete

T15

5.812*

0.493**

0.411

0.798

#0.135

#0.367

delete

T16

5.297*

0.521**

0.401

0.834

0.241

0.491

retain

T17

8.680*

0.639**

0.564

0.817

0.421

0.649

retain

T18

9.814*

0.651**

0.586

0.814

0.456

0.675

retain

Standard of judgment

≥3

≥0.4

≥0.4

≤0.835

≥0.2

≥0.45