search for: power_alt

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2012 Mar 23
0
Fixing error variance in a path analysis to model measurement error in scales using sem package
...s to Cronbach's alpha, which is a measure of reliability. What follows is the following path analysis model in theory (i.e., in practice the formulas are replaced with actual numbers): path.inf.final <- specifyModel() pRU -> sRU, test1 pRU -> rRU, test2 sRU -> rRU, test3 sRU -> power_alt, gam1 pRU -> power_alt, gam2 rRU -> power_alt, gam3 sRU -> ms_alt, gam7 pRU -> ms_alt, gam8 rRU -> ms_alt, gam9 sRU <-> sRU, NA, (1 - alpha(sRU))*(variance(sRU)) pRU <-> pRU, NA, (1 - alpha(pRU))*(variance(pRU)) rRU <-> rRU, NA, (1 - alpha(rRU))*(variance(rRU)) pow...