Range of numerical integration PreviousNext
Mplus Discussion > Categorical Data Modeling >
 yang posted on Tuesday, January 07, 2014 - 4:29 am
I'm using Mplus version 7 to estimate unidimensional graded response models with ML. I learned from the manual that by setting "integration = standard(48)", Mplus will use rectangular quadratures (am I correct?). My question is how Mplus determines the range of quadrature nodes?

 Linda K. Muthen posted on Tuesday, January 07, 2014 - 8:32 am
With rectangular integration (our default) we use equally spaced integration points between 5 to 5

With Gauss Hermite integration the integration points are roots of the Hermite polynomials they are not equally spaced so technically talking about range is misleading. For 30 points the smallest/largest roots are +-9.7

Also because we use adaptive integration, the integration changes from one iteration to the next and from one observation to another.
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