The document provides instructions for obtaining Cronbach's alpha to measure the reliability of a scale in SPSS. It describes selecting "Reliability Analysis" from the "Analyze" menu, then dragging the scale items to the dialog box. It notes the output shows Cronbach's alpha of 0.915 based on 672 cases, indicating high internal consistency reliability of the scale, as removing any items would not increase the score.

1. Analyzing Data Using SPSS (Reliability)

13. 672 cases (observations/respondents) were used in the calculation of Cronbach’s alpha

14. The obtained alpha score is 0.915, which indicates that the scale has high internal consistency (reliability)

15. Under the “Cronbach’s Alpha if Item deleted” the reliability of 0.915 is the highest, so it is not necessary to delete any of the items to improve the reliability score of this scale