CONSTRUCTED-RESPONSE DIF EVALUATIONS FOR MIXED-FORMAT TESTS

Investigating the Impact of Response Format on the Performance of Grammar Tests: Selected and Constructed

When constructing a test, an initial decision is choosing an appropriate item response format which can be classified as selected or constructed. In large-scale tests where time and finance are of concern, the use of response chosen known as multiple-choice items is quite widespread. This study aimed at investigating the impact of response format on the performance of structure tests. Concurren...

Assessing IRT Model-Data Fit for Mixed Format Tests

This study examined various model combinations and calibration procedures for mixed format tests under different item response theory (IRT) models and calibration methods. Using real data sets that consist of both dichotomous and polytomous items, nine possibly applicable IRT model mixtures and two calibration procedures were compared based on traditional and alternative goodnessof-fit statisti...

DIF: An Interchange Format for Dataflow-Based Design Tools

The dataflow interchange format (DIF) is a textual language that is geared towards capturing the semantics of graphical design tools for DSP system design. A key objective of DIF is to facilitate technology transfer across dataflow-based DSP design tools by providing a common, extensible semantics for representing coarse-grain dataflow graphs, and recognizing useful sub-classes of dataflow mode...

Classification Accuracy of Mixed Format Tests: A Bi-Factor Item Response Theory Approach

Mixed format tests (e.g., a test consisting of multiple-choice [MC] items and constructed response [CR] items) have become increasingly popular. However, the latent structure of item pools consisting of the two formats is still equivocal. Moreover, the implications of this latent structure are unclear: For example, do constructed response items tap reasoning skills that cannot be assessed with ...

Dataflow Interchange Format: Language Reference for DIF Language Version 1.0 User’s Guide for DIF Package Version 1.0