[R] disattenuated correlations

[David Duffy]

Jens Oehlschlägel 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".