[R] cronbachs alpha and missing values

[penv254]

i want to calculate cronbachs alpha for my df. my df has some missing values
so that there are only 23 out of 56 complete cases. if i run alpha on only
the complete cases, i get a value of .79 and if i run it on the whole df, I
get .82. My question is: what does alpha do with those missing values, if i
include the incomplete cases? are they imputed in some way?



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