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Table 1 Scale measurement properties of the General Functioning Scale (GFS)

From: The reliability of the general functioning scale in Norwegian 13–15-year-old adolescents and association with family dinner frequency

  Full sample n = 399 Test-retest n = 45
Item Mean SD CITCb αc ICCd
Total score General Functioning Scale a 1.72 (0.56) 0.85 0.83
Planning family activities is difficult because we misunderstand each other (reversed). 1.79 (0.79) 0.52   
In times of crisis, we turn to each other for support. 1.79 (0.73) 0.44   
We cannot talk to each other about the sadness we feel (reversed). 1.87 (0.91) 0.40   
Individuals are accepted for what they are. 1.68 (0.77) 0.42   
We avoid discussing our fears and concerns (reversed). 2.03 (0.76) 0.52   
We express feelings to each other. 1.84 (0.79) 0.53   
There are lots of bad feelings in our family (reversed). 1.57 (0.74) 0.52   
We feel accepted for what we are. 1.43 (0.62) 0.65   
Making decisions is a problem for our family (reversed). 1.76 (0.74) 0.58   
We are able to make decisions about how to solve problems. 1.66 (0.65) 0.62   
We do not get along well together (reversed). 1.54 (0.78) 0.52   
We confide in each other. 1.66 (0.66) 0.61   
  1. aAnswer categories ranging from 1 (strongly agree) to 4 (strongly disagree). The total score is then divided by the number of items on the subscale giving a total averaged score ranging from 1.0 (healthy functioning) to 4.0 (unhealthy functioning)
  2. bCorrected Item-Total Correlation for assessment of internal consistency
  3. cCronbach’s alpha for assessment of internal consistency
  4. dIntra-class correlation assessing test-retest reliability