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The use of item response theory models (IRT) in sport and exercise psychology has provided some unique insights into the quality of measure especially at the item level Fletcher. R. B. (August 2005). Detecting item bias in physical self-concept: an application of differential bundle functioning. In T. Morris, P. Terry, S. Gordon, S. Hanrahan, L. Ievleva, G. Kolt, & P. Tremayne (Eds.), Promoting...
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