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Table 1 Results for exploratory factor analysis of the HAS-J

From: Development and validation of the Japanese version of the Hyperarousal Scale

  

I

II

III

M

SD

I. Introspectiveness and Reactivity

20.

When things go wrong, I tend to get depressed.

 

0.94

−0.07

−0.12

1.73

0.94

12.

I get rattled when a lot happens at once. (R)

 

0.87

−0.18

− 0.11

1.52

0.98

22.

Some thoughts return too often. (I)

 

0.84

0.01

0.03

1.74

0.96

26.

I keep thinking about the same things long after they happened.

 

0.81

0.11

0.02

1.63

0.99

23.

I take a long time to make decisions. (I)

 

0.74

−0.08

−0.06

1.38

0.97

9.

I tend to anticipate problems. (I)

 

0.65

0.09

0.06

1.40

0.97

17.

A sudden, loud noise would cause me a prolonged reaction. (R)

 

0.57

0.05

0.02

1.10

0.97

5.

I think a lot about feelings. (I)

 

0.57

0.22

0.09

1.89

0.93

11.

I take things personally. (I)

 

0.54

0.21

0.10

1.42

0.95

25.

I get tearful easily.

 

0.44

−0.08

0.07

0.98

0.97

21.

My routine is predictable.

 

0.42

0.09

−0.14

1.56

0.93

10.

My bedroom is a mess.

 

0.40

−0.33

0.18

0.87

0.97

II. Neuroticism

1.

I am well organized.

 

−0.12

0.86

−0.20

1.40

0.88

3.

I am a very careful worker.

 

−0.11

0.68

0.11

1.63

0.86

15.

I am a cautious person.

 

0.06

0.55

0.08

1.53

0.91

13.

I am good at details.

 

0.00

0.47

−0.01

1.01

1.00

18.

I am overly conscientious.

 

0.30

0.46

−0.08

1.28

0.89

III. Insomnia

14.

I have trouble falling asleep.

 

−0.22

−0.05

0.79

1.56

1.07

16.

In bed at night, my thoughts keep going.

 

0.15

0.18

0.67

1.46

1.08

2.

I am slow to awaken mornings.

 

0.13

−0.11

0.43

1.23

1.02

  

Factor correlation

I

II

III

  
  

I

0.45

0.54

  
  

II

 

0.29

  
  

III

  

  

Excluded items

4.

My mind is always going. (I)

 

1.68

0.92

6.

Bright lights, crowds, noises or traffic bother me. (R)

 

1.22

1.02

7.

Evenings are my best time.

 

0.93

1.01

8.

I cannot take naps, even if I try.

 

1.21

1.14

19.

Caffeine affects me strongly.

 

0.77

0.95

24.

Alcohol makes me sleepy.

 

0.90

1.00

  1. Exploratory factor analysis was performed to extract latent factors, using maximum likelihood estimation and promax rotation
  2. (I) = Introspectiveness subscale of the original version of the Hyperarousal Scale, (R) = Reactivity subscale of the original version of the Hyperarousal Scale