[Performance assessment using the Many-Facet Rasch Measurement]

This paper describes how the Many-Facet Rasch Measurement (MFRM) can be applied to constructed-response items and rater analysis. The article provides an introduction to MFRM, a description of facet analysis procedures, and an illustrative example to examine the effects of various sources of variability on students' performance on a DELE (Diplomas in Spanish as a Foreign Language) test by means of the FACETS program. Results highlight the usefulness of the MFRM to detect raters that have extreme values on the continuum of severity. MFRM facilitates comprehension of the assessment process as well as providing objective measurement of facet elements.