Research
Lexxica Documents
- The Word Engine: Building Vocabulary, Reading and Listening Skills through Cell Phones, iPods and PCs Browne C., Cihi, G. & Culligan, B. (2007)
- This article gives a brief introduction to Lexxica's Word Engine, a set of supplementary learning tools designed to teach the most important high frequency words that each student needs to learn. Key technologies which provide opportunities for efficient vocabulary acquisition and extensive reading and listening are explained.
- Measuring Vocabulary Size via Online Technology Browne, Cihi and Culligan (2007)
- This article provides an introduction to some of the key concepts underlying Lexxica's patent-pending learning technologies as well as key research articles which inform our thinking.
- Item Response Theory, Reliability and Standard Error Culligan, B. (2007)
- After reviewing how the Reliability Index, K-R20, and the Standard Error of Measurement are calculated under Classical Test Theory, this paper then discusses the basic principles of Item Response Theory, and how the Information Function is used to obtain a Standard Error of the Estimate, a statistic similar to the SEM. The paper concludes with an explanation of how this affects the scores reported by V-Check and how the scores can be interpreted.