mpt | R Documentation |
This function defines a MPT module for incorporation into a
psychTestR timeline.
Use this function if you want to include the MPT in a
battery of other tests, or if you want to add custom psychTestR
pages to your test timeline.
For demoing the MPT, consider using demo_mpt()
.
For a standalone implementation of the MPT,
consider using standalone_mpt()
.
mpt(
num_items = 30L,
take_training = TRUE,
label = "MPT",
feedback = mpt.feedback.no_score(),
audio_dir = "https://media.gold-msi.org/test_materials/MPT/v1-1/audio",
training_dir = "https://media.gold-msi.org/test_materials/MPT/training",
next_item.criterion = "bOpt",
next_item.estimator = "BM",
next_item.prior_dist = "norm",
next_item.prior_par = c(0, 1),
final_ability.estimator = "WL",
constrain_answers = FALSE,
dict = mpt::mpt_dict
)
num_items |
(Integer scalar) Number of items in the test. |
take_training |
(Logical scalar) Whether to include the training phase. |
label |
(Character scalar) Label to give the MPT results in the output file. |
feedback |
Defines the feedback to give the participant
at the end of the test. By default no feedback is given.
This can be a timeline segment (as created by
|
audio_dir |
(Character scalar) File path to the directory hosting the audio (typically a publicly accessible web directory). |
training_dir |
(Character scalar) File path to the directory hosting the training items' audio (typically a publicly accessible web directory). |
next_item.criterion |
(Character scalar)
Criterion for selecting successive items in the adaptive test.
See the |
next_item.estimator |
(Character scalar)
Ability estimation method used for selecting successive items in the adaptive test.
See the |
next_item.prior_dist |
(Character scalar)
The type of prior distribution to use when calculating ability estimates
for item selection.
Ignored if |
next_item.prior_par |
(Numeric vector, length 2)
Parameters for the prior distribution;
see the |
final_ability.estimator |
Estimation method used for the final ability estimate.
See the |
constrain_answers |
(Logical scalar)
If |
dict |
The psychTestR dictionary used for internationalisation. |
Versions <= 0.2.0 of this package experimented with weighted likelihood ability estimation for item selection. However, subsequent versions of the package revert to Bayes modal ability estimation for item selection, consistent with the original MPT paper.
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