# Cronbach's alpha and reverse-scored items

When calculating Cronbach's $$\alpha$$, would I include the reverse scores? I have 20 items in total, including 11 reverse-scored items. Would I just calculate the original scores?

You should reverse the scores of the reversed items before computing Cronbach's $$\alpha$$.
If you wish to reverse items into the original scale you can compute: $$r_{jk} = (max_j-min_j) - x_{jk}$$
Where $$max_j$$ and $$min_j$$ are the theoretical maximum and minimum values of item $$j$$, $$x_{jk}$$ is the score of individual $$k$$ in item $$j$$ and $$r_{jk}$$ is the reversed score of individual $$k$$ in item $$k$$.