Jens Oehlschl??gel asked:>
> Can someone point me to literature and/or R software to solve the following
> problem:
>
> Assume n true scores t measured as x with uncorrelated errors e , i.e.
> x = t + e
> and assume each true score to a have a certain amount of correlation with
> some of the other true scores.
>
> but I don't have predefined asumptions about structure in the variable
set
> as I guess would be needed for SEM.
>
No, the sem package will do this, providing you have the
reliabilities/repeat measures. This is a standard "measurement
model".