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Table 2 Item-total correlation and Cronbach's alpha with item deleted of Type D Scale-14 Taiwanese version ( N = 508)

From: The validity of the Type D construct and its assessment in Taiwan

 

Item-Total Correlation

α if Item Deleted

Item Content

DS14

DS16-T

DS14-T

DS14

DS16-T

DS14-T

Negative affectivity

   

.86a

.86 a

.86 a

2. I often make a fuss about unimportant things.

.44

.44

.44

.87

.87

.87

4. I often feel unhappy.

.69

.69

.69

.83

.83

.83

5. I am often irritated.

.73

.73

.73

.83

.83

.83

7. I take a gloomy view of things.

.61

.61

.61

.84

.84

.84

9. I am often in a bad mood.

.72

.72

.72

.83

.83

.83

12. I often find myself worrying about something.

.58

.58

.58

.85

.85

.85

13. I am often down in the dumps.

.69

.69

.69

.83

.83

.83

Social inhibition

   

.76 a

.76 a

.79 a

1. I make contact easily when I meet people.

.47

.42

.39

.74

.74

.79

3. I often talk to strangers.

.30

.30

-

.78

.77

-

6. I often feel inhibited in social interactions.

.54

.53

.60

.72

.73

.75

8. I find it hard to start a conversation.

.59

.57

.59

.71

.72

.75

10. I am a closed kind of person.

.51

.52

.55

.73

.73

.76

11. I would rather keep other people at a distance.

.45

.50

.50

.74

.73

.77

14. When socializing, I don’t find the right things to talk about.

.57

.58

.58

.72

.72

.75

15. I would rather keep in the background.

-

.21

-

 

.78

-

16. I don't like to have a lot of people around me.

-

.46

.45

 

.74

.78

  1. DS14 = Original 14-items Type D Scale; DS16-T = Added 2 new items in DS14 in Taiwan; DS14-T = final 14-item Taiwan version DS14;
  2. α = Cronbach's alpha coefficient; items with the item-total correlation smaller than .30 and an increase in Cronbach’s alpha when deleted are in boldface.
  3. a Cronbach's alpha coefficient of subscale.