Description Usage Arguments Author(s) References Examples
Calculate alpha for a given data set.
1 |
y |
Data |
varphi |
Downweight rate |
se |
Whether to estimate standard error. It will take significant more time if se is requested. |
complete |
Calculate alpha only based on complete data (lisewise deletion) |
Zhiyong Zhang and Ke-Hai Yuan
Zhang, Z. & Yuan, K.-H. (2013). Robust Cronbach's alpha.
1 2 3 4 5 6 7 | data(holzinger)
spatial<-holzinger[, c('visual', 'cubes', 'paper', 'lozenge', 'paperrev','flagssub')]
verbal<-holzinger[, c('general', 'paragrap', 'sentence', 'wordc', 'wordm')]
speed<-holzinger[, c('add', 'code', 'counting', 'straight')]
memory<-holzinger[, c('wordr', 'numberr', 'figurer', 'object', 'numberf', 'figurew')]
alpha.spatial<-cronbach(spatial, varphi=.01)
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