min2LL_4pno function

Compute 4PNO Deviance

Internal function to -2LL

min2LL_4pno(N, J, Y, as, bs, gs, ss, theta)

Arguments

• N: An int, which gives the number of observations. (> 0)
• J: An int, which gives the number of items. (> 0)
• Y: A N by J matrix of item responses.
• as: A vector of item discrimination parameters.
• bs: A vector of item threshold parameters.
• gs: A vector of item lower asymptote parameters.
• ss: A vector of item upper asymptote parameters.
• theta: A vector of prior thetas.

Returns

-2LL.

See Also

Gibbs_4PNO()

Author(s)

Steven Andrew Culpepper