Description Usage Arguments Value

View source: R/IRF_functions.R

Writing the derivative of the log-likelihood of the 2PL in theta for a single item as M * dIRF, this function computes (a matrix of values of) M, with dIRF being the first deriviative of the 2PL IRF. Called by functions that compute derivative of the log-likelihood.

1 | ```
M(resp, parms, theta)
``` |

`resp` |
a matrix or data.frame containing the binary item responses. |

`parms` |
a named list or data.frame with elements |

`theta` |
the latent trait. |

`dim(resp)`

-matrix of multipliers.

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