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Computerized Adaptive Testing System of Functional Assessment of Stroke

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Published on: January 7, 2019

Varying the valuating function and the presentable bank in computerized adaptive testing.

Juan Ramón Barrada¹, Francisco José Abad, Julio Olea

¹Facultad de Psicología, Universidad Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain. juanramon.barrada@uab.es

The Spanish Journal of Psychology

|May 17, 2011

Summary

This summary is machine-generated.

This study enhances computerized adaptive testing by combining Fisher information and matching criterion functions. Strategic item selection improves test security with minimal accuracy loss, suggesting stratification is unnecessary.

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Area of Science:

Psychometrics
Educational Measurement

Background:

Computerized adaptive testing (CAT) commonly uses the Fisher information function for item selection.
Item bank security is crucial, with the matching criterion proposed as a convenient alternative.
Recent research suggests varying valuating functions within a test is beneficial.

Purpose of the Study:

To explore combining the matching criterion with the Fisher information function in CAT.
To investigate the impact of manipulating the number of strata in item banks.
To evaluate the trade-offs between test accuracy and item bank security.

Main Methods:

Implementing a combined Fisher information and matching criterion approach.
Varying the number of strata within the item bank.
Analyzing the effect of item selection strategy on accuracy and security.

Main Results:

Combining functions allows dynamic adjustment between accuracy and security.
Selecting items using the matching criterion significantly enhances security with minor accuracy reduction.
Stratifying the item bank generally offers limited advantages.

Conclusions:

A hybrid approach using both Fisher information and matching criterion offers flexibility in CAT.
Prioritizing matching criterion for item selection is effective for improving item bank security.
Avoiding item bank stratification appears more advantageous for balancing accuracy and security.