Ideally, one would like to have a number of studies in
order to reveal a multi-dimensional structure that holds
across several samples. However, that is precisely what is
missing. When used in other samples than the development
one, constructs that were hypothesized to be separate
constructs collapsed into one (e.g., Dannhauser and
Boshoff 2007; Dennis and Winston 2003). Given these
mostly unsuccessful attempts, it should not come as a surprise
that Ehrhart (2004) used a one-dimensional selfdeveloped
14-item scale. However, a one-dimensional scale
does not do justice to the concept of servant leadership.