Items | Upper jaw questionnaire, N = 109 | Lower jaw questionnaire, N = 126 | ||||
---|---|---|---|---|---|---|
Corrected Item-Total Correlation | Squared Multiple Correlation | Cronbach's Alpha if Item Deleted | Corrected Item-Total Correlation | Squared Multiple Correlation | Cronbach's Alpha if Item Deleted | |
I1 | 0.74 | 0.64 | 0.89 | 0.75 | 0.59 | 0.90 |
I2 | 0.83 | 0.79 | 0.88 | 0.68 | 0.68 | 0.91 |
I3 | 0.78 | 0.75 | 0.89 | 0.84 | 0.73 | 0.89 |
I4 | 0.74 | 0.64 | 0.89 | 0.78 | 0.67 | 0.90 |
I5 | 0.63 | 0.46 | 0.90 | 0.69 | 0.52 | 0.91 |
I6 | 0.82 | 0.72 | 0.88 | 0.78 | 0.71 | 0.90 |
I7 | 0.54 | 0.39 | 0.91 | 0.59 | 0.47 | 0.91 |
I8 | 0.54 | 0.46 | 0.91 | 0.68 | 0.52 | 0.91 |
Cronbach’s Alpha | 0.91 | 0.92 |