EAP theta over a response matrix – alias

One implementation: each row goes to morie_psy_eap_theta(). items has columns a, b and optionally c, one row per item.

Usage

morie_psy_theta_eap(X, items, prior = c(0, 1), n_nodes = 61L)

Arguments

X

response matrix, examinees by items.

items

item-parameter matrix.

prior

c(mean, sd).

n_nodes

quadrature nodes.

Value

list: theta, se, n_examinees, n_items, alias_of, method.

References

Bock RD & Mislevy RJ (1982). Adaptive EAP estimation of ability in a microcomputer environment. Applied Psychological Measurement, 6(4), 431-444.

Examples

X <- matrix(c(1, 0, 1, 1), 1)
morie_psy_theta_eap(X, cbind(rep(1, 4), c(-1, -0.5, 0.5, 1)))$theta
#> [1] 0.560586