Description Usage Arguments Value
Used to estimate theta in est_2PL
.
1 | dlogL(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. |
length(theta)
- vector of first derivatives of log-likelihood of 2PL, in theta.
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