Developing Equivalent Forms of a Test of General and Academic Vocabulary

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Phil Bennett, Tim Stoeckel, Miyazaki International College


This paper outlines the development of a new vocabulary test that assesses written receptive knowledge of the words in the General Service List and the Academic Word List. The test is intended to enable the provision of diagnostic feedback and goal setting over the course of a program of study. To avoid a possible testing effect from repeated assessment, 4 forms of the test were created, each made to the same blueprint. The instrument was field-tested with 334 Japanese university students, and results were analyzed from a Rasch measurement perspective. The vast majority of test items demonstrate good technical quality, test reliability for the 4 forms ranges from .87 to .93, and the 4 test forms have been found to be equivalent for use with Japanese students, within 1 standard error.