Brent Culligan

Estimating word difficulty using yes/no tests

Brent Culligan, 2008 .

IRT, Testing, and Online Technology : The Future of Vocabulary Learning?(Pedagogical Considerations for University English Instruction in a New Era of Open Admissions)

Charles Browne, Brent Culligan, 2006 .

Combining technology and IRT testing to build student knowledge of high-frequency vocabulary

Charles M. Browne, Charles Browne, Brent Culligan, 2008, The JALT CALL Journal.