Plot observed and predicted scores against ability
Produces a plot of IRT true scores (test response function at the estimated ability) with a confidence band (plus/minus standard error). The observed sum scores are shown in red.
scp(resp, ip, theta = NULL)
resp |
A matrix of binary responses to a test, with persons as rows and items as columns. |
ip |
Item parameters: the output of |
theta |
An object containing ability estimates, as output by function
|
None
Ivailo Partchev
scp(Scored, Scored2pl)
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