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New Developments in Mplus Version 7: Part 2 - Muthén & Muthén

New Developments in Mplus Version 7: Part 2 - Muthén & Muthén

New Developments in Mplus Version 7: Part 2 - Muthén & Muthén

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Random Load<strong>in</strong>gs In IRT Cont<strong>in</strong>uedModel 1 - without cluster specific factor variance, cluster specificdiscrim<strong>in</strong>ation, cluster specific difficulty, cluster specific factormeanP(Y ijk = 1) = Φ(a jk θ ij + b jk )a jk ∼ N(a k ,σ a,k ),b jk ∼ N(b k ,σ b,k )θ ij = θ j + ε ijε ij ∼ N(0,1)θ j ∼ N(0,v)Bengt <strong>Muthén</strong> & Tihomir Asparouhov <strong>New</strong> <strong>Developments</strong> <strong>in</strong> <strong>Mplus</strong> <strong>Version</strong> 7 7/ 159

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