Since the early days of performance assessment, human ratings have been subject to various forms of error and bias. Expert raters often come up with different ratings for the very same performance and it seems that assessment outcomes largely depend upon which raters happen to assign the rating. This book provides an introduction to many-facet Rasch measurement (MFRM), a psychometric approach that establishes a coherent framework for drawing reliable, valid, and fair inferences from rater-mediated assessments, thus answering the problem of fallible human ratings. Revised and updated...

The book introduces the reader to an argument-based approach to validity as a way to improve test validation in Second Language Acquisition (SLA) research. Motivated by the need for practical suggestions for raising proficiency assessment standards in SLA research, it exemplifies the approach by validating two distinct score interpretations for a new Russian Elicited Imitation Test (EIT). Two empirical investigations with 164 Russian learners in the USA and Germany were conducted to evaluate the accuracy of the score interpretations associated with two distinct test uses. The EIT proved to...

C-Tests bestehen aus mehreren kurzen Texten, in denen die zweite Halfte jedes zweiten Wortes fehlt. Sie gelten in der Regel als objektives, reliables, valides und okonomisches Instrument zur Messung allgemeiner Sprachkompetenz und werden mittlerweile in einer Vielzahl von Kontexten eingesetzt. Der vorliegende Sammelband illustriert den aktuellen Stand der (anwendungsbezogenen) C-Test-Forschung mit einem Schwerpunkt auf der zentralen Frage der Konstruktvaliditat.
C-Tests consist of several short texts in which the second half of every second word has been deleted. As a rule, they are...