Errors correlations

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  • #761
    Itaysisso
    Participant

    How can you correlate residual errors of observed variables in Onyx?
    In Amos you simply draw a correlation between the error variables but in Onyx there are none (rather the arrow loop).

    Thanks,
    Itay

    #762
    Timo von Oertzen
    Participant

    Hi Itay,

    You can add a correlation (in form of a covariance) between any two nodes by adding a double-headed arrow between the two nodes (e.g., in your case, the observed variables). The easiest way is to hold down the SHIFT button while you drag with the right mouse button from one variable to the other, than a new covariance arrow will appear. You have to right-click on it and set it to “free parameter” if you want the covariance to be freely estimated from your data.

    Cheers,

    Timo

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