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Download full textInga Laukaityte; Marie Wiberg – Practical Assessment, Research & Evaluation, 2024
The overall aim was to examine effects of differences in group ability and features of the anchor test form on equating bias and the standard error of equating (SEE) using both real and simulated data. Chained kernel equating, Postratification kernel equating, and Circle-arc equating were studied. A college admissions test with four different…
Descriptors: Ability Grouping, Test Items, College Entrance Examinations, High Stakes Tests
FIPC Linking across Multidimensional Test Forms: Effects of Confounding Difficulty within Dimensions
Direct linkKim, Sohee; Cole, Ki Lynn; Mwavita, Mwarumba – International Journal of Testing, 2018
This study investigated the effects of linking potentially multidimensional test forms using the fixed item parameter calibration. Forms had equal or unequal total test difficulty with and without confounding difficulty. The mean square errors and bias of estimated item and ability parameters were compared across the various confounding tests. The…
Descriptors: Test Items, Item Response Theory, Test Format, Difficulty Level
Schoen, Robert C.; Yang, Xiaotong; Liu, Sicong; Paek, Insu – Grantee Submission, 2017
The Early Fractions Test v2.2 is a paper-pencil test designed to measure mathematics achievement of third- and fourth-grade students in the domain of fractions. The purpose, or intended use, of the Early Fractions Test v2.2 is to serve as a measure of student outcomes in a randomized trial designed to estimate the effect of an educational…
Descriptors: Psychometrics, Mathematics Tests, Mathematics Achievement, Fractions
DeStefano, Lizanne; Johnson, Jeremiah – American Institutes for Research, 2013
This paper describes one of the first efforts by the National Assessment of Educational Progress (NAEP) to improve measurement at the lower end of the distribution, including measurement for students with disabilities (SD) and English language learners (ELLs). One way to improve measurement at the lower end is to introduce one or more…
Descriptors: National Competency Tests, Measures (Individuals), Disabilities, English Language Learners
Li, Yuan H.; Griffith, William D.; Tam, Hak P. – 1997
This study explores the relative merits of a potentially useful item response theory (IRT) linking design: using a single set of anchor items with fixed common item parameters (FCIP) during the calibration process. An empirical study was conducted to investigate the appropriateness of this linking design using 6 groups of students taking 6 forms…
Descriptors: Ability, Difficulty Level, Equated Scores, Error of Measurement
Peer reviewedStraton, Ralph G.; Catts, Ralph M. – Educational and Psychological Measurement, 1980
Multiple-choice tests composed entirely of two-, three-, or four-choice items were investigated. Results indicated that number of alternatives per item was inversely related to item difficulty, but directly related to item discrimination. Reliability and standard error of measurement of three-choice item tests was equivalent or superior.…
Descriptors: Difficulty Level, Error of Measurement, Foreign Countries, Higher Education
Colton, Dean A. – 1993
Tables of specifications are used to guide test developers in sampling items and maintaining consistency from form to form. This paper is a generalizability study of the American College Testing Program (ACT) Achievement Program Mathematics Test (AAP), with the content areas of the table of specifications representing multiple dependent variables.…
Descriptors: Achievement Tests, Difficulty Level, Error of Measurement, Generalizability Theory
Test-Retest Analyses of the Test of English as a Foreign Language. TOEFL Research Reports Report 45.
Henning, Grant – 1993
This study provides information about the total and component scores of the Test of English as a Foreign Language (TOEFL). First, the study provides comparative global and component estimates of test-retest, alternate-form, and internal-consistency reliability, controlling for sources of measurement error inherent in the examinees and the testing…
Descriptors: Difficulty Level, English (Second Language), Error of Measurement, Estimation (Mathematics)
