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Table 3 Test of scaling assumptions

From: Father for the first time - development and validation of a questionnaire to assess fathers’ experiences of first childbirth (FTFQ)

Scale

Item internal consistency

  

Item

Item

Item

Item-scale

Cronbachs

Discriminant

Correlations

Variance, SD

 

Correlation*

alpha**

validity

range***

range ****

Worry

7/8

0.82

8/8

0.34-0.67

0.78-1.17

Information

4/4

0.73

4/4

0.45-0.57

0.74-0.98

Emotional

     

support

3/6

0.65

6/6

0.26-0.48

0.92-1.22

Acceptance

4/4

0.66

3/4

0.40-0.49

0.72-0.97

  1. * Item scale correlation > 0.40, corrected for overlap / number of correlations.
  2. ** Scale internal consistency reliability (Cronbachs alpha).
  3. *** Item-scale correlations roughly the same for all items in the scale.
  4. **** Item in hypothesized scale have roughly equal variances.