View source: R/calculate_adaptivity_measures.r
calculateAdaptivityMeasures | R Documentation |
calculateAdaptivityMeasures
is a function for
calculating commonly used adaptivity measures.
calculateAdaptivityMeasures(x, with_constraints = FALSE, config = NULL)
x |
an |
with_constraints |
|
config |
only used when |
calculateAdaptivityMeasures
returns a named list:
corr
the correlation between final theta estimates and average test locations.
ratio
the ratio of (1) standard deviation of average test locations, versus (2) standard deviation of final theta estimates.
PRV
the proportion of variance reduced, from (1) the variance of item locations of all items in the pool, by (2) the average of test location variances.
info
(1) average information of a test at final theta estimate, relative to (2) best average obtainable from item pool using same test length, adjusting for (3) average information from item pool using random selection.
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