Open AccessSOME EMPIRICAL GUIDELINES FOR BUILDING TESTLETS 1
Author(s) -
Wainer Howard,
Kaplan Bruce,
Lewis Charles
Publication year - 1991
Publication title -
ets research report series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.235
H-Index - 5
ISSN - 2330-8516
DOI - 10.1002/j.2333-8504.1991.tb01423.x
Subject(s) - generality , econometrics , measure (data warehouse) , aggregate (composite) , series (stratigraphy) , computerized adaptive testing , statistics , item response theory , computer science , mathematics , psychology , psychometrics , data mining , paleontology , materials science , biology , composite material , psychotherapist
A series of computer simulations were run to measure the relationship between testlet validity and the factors of item pool size and testlet length for both adaptive and linearly constructed testlets. We confirmed the generality of earlier empirical findings (Wainer, Lewis, Kaplan & Braswell, 1991) that making a testlet adaptive yields only marginal increases in aggregate validity because of the peakedness of the typical proficiency distribution.