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Investigating Stability Of Item Parameters In One And Two-Parameter Partial Credit Models On Pisa Science Cognitive Data, Luc T. Le
Dr Luc Tu Le
This study focuses on investigating the stability of item parameter estimates from partial credit model (PCM) and generalised partial credit model (GPCM) respectively, by the test form booklets across the country and language groups used in the PISA study (Programme for International Student Achievement). From that, it could suggest whether the item discrimination parameter should be needed in the item calibration model for large and heterogeneous samples of an international test like PISA, particularly for PISA Science 2015.
Evaluation Of Booklet Effect In Pisa Mathematics Across Countries, Luc Le
Evaluation Of Booklet Effect In Pisa Mathematics Across Countries, Luc Le
Dr Luc Tu Le
In PISA 2003, 13 main linked test booklets were constructed by item cluster rotation design. Each student was randomly assigned one of the test booklets. Each of the selected clusters was located in four of the test booklets in different positions. There were seven mathematics clusters with a total of 85 items. Booklet effect was identified and was used to adjust the measure of student performance in PISA (see PISA 2003 technical report; OECD, 2004). This study was designed to explore which factors could account for this booklet effect in mathematics across 41 PISA countries. A three-faceted partial credit model …
Differential Performance Of Poor Readers In International Mathematics Tests By Item Formats, Luc Le
Differential Performance Of Poor Readers In International Mathematics Tests By Item Formats, Luc Le
Dr Luc Tu Le
The important role of language, including reading, on student performance on assessments in school academic areas such as mathematics has been addressed in number of studies. Although positive relations between different aspects of reading and mathematics performance have been investigated, there have been few studies focusing on the interaction between the context of the mathematics item and student reading proficiency, and most of those there were related only to the verbal loading. Recently, a low correlation between verbal loading and item difficulty was found for PISA mathematics items. This study used PISA 2003 mathematics data with 41 countries with about …
Investigating Gender Differential Item Functioning Across Countries And Test Languages For Pisa Science Items, Luc Le
Dr Luc Tu Le
This study uses PISA cycle 3 field trial data to investigate the relationships between gender differential item functioning (DIF) across countries and test languages for science items and their formats and the four other dimensions defined in PISA framework: focus, context, competency, and scientific knowledge. The data used were collected from 60 test language groups by 50 participating countries with a total of about 83,000 15-year-old students. An IRT method is used to detect the gender uniform DIF for each of the language groups and the whole international sample. Gender directions have been drawn for each of the five item …