posterior | R Documentation |

Calculate posterior for one item given score, difficulty and prior

posterior(score, tau, prior, qp)

`score` |
Integer, either 0 (fail) and 1 (pass) |

`tau` |
Numeric, difficulty parameter |

`prior` |
Vector of prior values on quadrature points |

`qp` |
vector of equally spaced quadrature points |

This function assumes that the difficulties have been estimated by
a binary Rasch model, e.g. by `rasch.pairwise.itemcluster()`

of
the `sirt`

package.

A vector of length `length(prior)`

: Internal function

Stef van Buuren, Arjan Huizing, 2020

`dscore()`

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