FIPC Linking across Multidimensional Test Forms: Effects of Confounding Difficulty within Dimensions

Autor/inn/en	Kim, Sohee; Cole, Ki Lynn; Mwavita, Mwarumba
Titel	FIPC Linking across Multidimensional Test Forms: Effects of Confounding Difficulty within Dimensions
Quelle	In: International Journal of Testing, 18 (2018) 4, S.323-345 (23 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1530-5058
DOI	10.1080/15305058.2018.1428980
Schlagwörter	Test Items; Item Response Theory; Test Format; Difficulty Level; Test Construction; Error of Measurement; Testing Problems + Suchen Sie Ihr Suchwort? Test content; Testaufgabe; Item-Response-Theorie; Testentwicklung; Schwierigkeitsgrad; Testaufbau; Messfehler
Abstract	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 estimated discrimination parameters were influenced by the levels of correlation between dimensions. The mean square errors (MSEs) of the average of the true discrimination parameters with the estimated value were smallest when the correlation equaled 0; however, the MSEs of the multidimensional discrimination parameter were smallest when the correlation was larger than 0. The estimated difficulty parameters were highly affected by different amount of confounding difficulty within dimensions. Furthermore, the MSEs of the average of the true ability parameters on the first and second dimensions with the estimated ability were smaller than those from the ability parameter on each dimension for all conditions. The pattern varied according to the number of common items, and the measures of MSE and squared bias were relatively consistent across forms at the same level of correlation, except for the condition where the correlation was 0 and the number of common items was 8. (As Provided).
Anmerkungen	Routledge. Available from: Taylor & Francis, Ltd. 530 Walnut Street Suite 850, Philadelphia, PA 19106. Tel: 800-354-1420; Tel: 215-625-8900; Fax: 215-207-0050; Web site: http://www.tandf.co.uk/journals
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01