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Reliability and Validity01:29

Reliability and Validity

Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.

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Related Experiment Video

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Computerized Adaptive Testing System of Functional Assessment of Stroke
05:21

Computerized Adaptive Testing System of Functional Assessment of Stroke

Published on: January 7, 2019

Estimation of an examinee's ability in the web-based computerized adaptive testing program IRT-CAT.

Yoon-Hwan Lee1, Jung-Ho Park, In-Yong Park

  • 1Department of Information and Statistics, Hallym University, Chuncheon, Korea. yoonani72@gmail.com

Journal of Educational Evaluation for Health Professions
|February 19, 2009
PubMed
Summary

We created a web-based adaptive testing program for accessible ability estimation. This system offers immediate results, replacing older desktop applications for efficient assessment.

Keywords:
Computerized Adaptive TestingEstimationExaminee's AbilityItem Response Theory

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Area of Science:

  • Computer Science
  • Educational Technology
  • Psychometrics

Background:

  • Traditional testing methods often lack efficiency and immediate feedback.
  • Existing computerized adaptive testing (CAT) solutions may be inaccessible or require specialized software.
  • There is a need for a universally accessible platform for ability estimation.

Purpose of the Study:

  • To develop a freely available, web-based computerized adaptive testing (CAT) program.
  • To enable immediate estimation of examinee ability using modern web technologies.
  • To provide a flexible system for test creation and item management.

Main Methods:

  • Developed a web-based CAT system using PHP, Java Script, and PostgresSQL on an Apache/Linux server.
  • Implemented functionality for user input, item searching, and test generation.
  • Applied Rasch and 2- or 3-parametric logistic models for ability estimation.

Main Results:

  • Successfully constructed a functional web-based CAT system.
  • The system allows for immediate ability estimation upon test completion.
  • Replaced the need for personal computer-based testing applications.

Conclusions:

  • The developed web-based CAT system provides accessible and immediate ability estimation.
  • This platform offers a significant advancement over traditional and desktop-based assessment tools.
  • The system is suitable for various educational and professional testing scenarios.