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. 2018 Jan 22;6(1):e24. doi: 10.2196/mhealth.9186

Table 3.

Cronbach alpha coefficient when one item is dropped.

Variable dropped Raw alpha Change in raw alpha Standardized alpha Change in standardized alpha
1 0.9420 -0.002916 0.9421 -0.002891
2 0.9428 -0.002099 0.9429 -0.002036
3 0.9431 -0.001823 0.9432 -0.001779
4 0.9424 -0.002526 0.9425 -0.002475
5 0.9417 -0.003142 0.9419 -0.003078
6 0.9422 -0.002689 0.9422 -0.002763
7 0.9432 -0.001728 0.9431 -0.001808
8 0.9440 -0.0009210 0.9440 -0.0009085
9 0.9419 -0.003009 0.9420 -0.002976
10 0.9409 -0.003969 0.9412 -0.003782
11 0.9422 -0.002717 0.9424 -0.002575
12 0.9402 -0.004725 0.9404 -0.004517
13 0.9410 -0.003918 0.9413 -0.003683
14 0.9399 -0.004983 0.9402 -0.004768
15 0.9412 -0.003729 0.9413 -0.003698
16 0.9423 -0.002553 0.9420 -0.002922
17 0.9423 -0.002538 0.9422 -0.002754
18 0.9420 -0.002886 0.9418 -0.003143
19 0.9443 -0.0006234 0.9443 -0.0006999
20 0.9434 -0.001453 0.9418 -0.003143