Simulate pretest responses to new items

Simulate pretest responses to new items

Usage

cs_responses(sim, n_per_item = 50, theta_mean = 0, theta_sd = 1, seed = NULL)

Arguments

sim

A `cs_sim`.

n_per_item

Responses per new item (scalar, or vector named by item).

theta_mean, theta_sd

Ability distribution of pretest examinees.

seed

Optional seed.

Value

Long data frame: `item`, `theta` (examinee ability, treated as known from operational scoring), `x` (0/1).

Examples

sim <- cs_simulate(n_train = 200, n_new = 60, seed = 1)
resp <- cs_responses(sim, n_per_item = 30, seed = 2)
head(resp)
#>    item       theta x
#> 1 G0201 -0.89691455 1
#> 2 G0201  0.18484918 0
#> 3 G0201  1.58784533 1
#> 4 G0201 -1.13037567 0
#> 5 G0201 -0.08025176 1
#> 6 G0201  0.13242028 0