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Table 2 Scale Means, Standard Deviations, and Alpha Coefficients

From: Protocol of a randomized controlled trial of hearing protection interventions for farm operators

Scale name

Number of items

Range of scores

Mean

Cronbach’s alpha

Barriersa

13

1-6

2.61

.81

Benefitsb

5

1-10

8.88

.82

Self Efficacya

11

1-6

4.43

.75

Situational Influencesa

11

1-6

4.07

.81

Normsc

4

1-3

2.33

.68

Modelingd

4

1-5

2.27

.81

Supporte

4

1-3

1.41

.69

HPD Usef

4

0-100

27.50g

.89

Social desirabilityh

8

8-24

.i

.74

  1. aRating scale (1=strongly disagree; 6=strongly agree); bRating scale (1=slightly important; 10= highly important); cRating scale (1=not at all; 3=a lot); dRating scale (1=never; 3=usually); eRating scale (1=never; 3=often); fHPD = hearing protection device; percent of time of use; g43.2% report zero use; 56.8 percent report some use; hRating scale (1=yes; 2=no); Inot determined for this population.