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Table 1 Descriptive Statistics, Internal Consistency Reliability and Test-retest Reliability for Media Processing and Critical Thinking Variables

From: The measurement of media literacy in eating disorder risk factor research: psychometric properties of six measures

 

Scale range

Sample A (N = 216)

 

Sample B (N = 208)

  

Time 1

 

Time 1

Time 2

 
  

Mean (SD)

α

CR

Mean (SD)

α

CR

Mean (SD)

ICC

Media attitudes questionnaire (MAQ)

 Realism scepticism subscale

1 to 5

4.13 (0.94)

.80 a

.80

3.80 (1.06)

.87

.86

4.10 (0.99)

.64***

 Similarity scepticism subscale

1 to 5

3.49 (1.12)

.83

.85

3.37 (1.00)

.76

.79

3.49 (1.04)

.81***

 Desirability scepticism subscale

1 to 5

2.90 (1.03)

.82

.84

2.94 (0.98)

.79

.80

3.16 (1.04)

.70***

Critical thinking about media messages

6 to 36

17.56 (6.91)

.90

.90

NA

NA

NA

NA

NA

Critical thinking about media messages – Appearance focus

6 to 36

15.78 (7.94)

.95

.95

NA

NA

NA

NA

NA

Fake subscale

1 to 5

NA

NA

NA

3.04 (0.99)

.92

.93

3.06 (1.07)

.80***

  1. Note. α Cronbach’s alpha, CR construct reliability, ICC intraclass correlation coefficient, NA data not available
  2. *p < .05; **p < .01; ***p < .001
  3. aSpearman-Brown coefficient calculated for internal consistency of a two-item scale