theta_ll {conquestr} | R Documentation |
theta_ll
Description
returns the log of the likelihood of theta, given a vector of item responses, item parameters. Note that this is the simple ll - it is the continuing product of the response probabilities. It includes a hack, that will nudge the raw response to the first item to adjust for zeros and perfects. This should be updated to work with adjusted raw scores instead...
Usage
theta_ll(theta, responses, itemParams)
Arguments
theta |
a scalar value of theta. |
responses |
a vector of item responses (used in a call to |
itemParams |
a list of item designs (each used in a call to |
Value
a double, the log of the likelihood at theta..
[Package conquestr version 1.5.1 Index]