Focuses on the Validation of Inferences

Focuses on the Validation of Inferences

Focuses on the Validation of Inferences

Research should be conducted that focuses on the validation of inferences based on accommodated assessments of students with disabilities and English language learners. Further research should be guided by a conceptual argument about the way accommodations are intended to function and the inferences the test results are intended to support. This research should include a variety of approaches and types of evidence, such as analyses of test content, test-takers' cognitive processes, and criterion related evidence, and other studies deemed appropriate.

Available research has not adequately investigated the extent to which different accommodations for students with disabilities and English language learners may affect the validity of inferences based on scores from NAEP and other large-scale assessments. While research has shed some light on the ways accommodations function and on some aspects of their effects on test performance, in the committee's view, a central component of validity has been missing from much of this research. Without a well articulated validation argument that explicitly specifies the claims and intended inferences that underlie NAEP and other assessments, and that also explicitly specifies possible counterclaims and competing inferences, research into the effects of accommodations on assessments of students with disabilities and English language learners is likely to consist largely of a series of loosely connected studies that investigate various accommodations, more or less at random. An approach and a framework for articulating a logical validation argument for an assessment is discussed in the next chapter. Articulating Validation Arguments Accommodations are necessary to enable many students with disabilities and English language learners to participate in NAEP and other large-scale assessments.

In this part, learning a foreign language needs a leaning tools, many students choose Rosetta Stone German and Rosetta Stone Hebrew to learn German and Hebrew.Because there is no definitive science to guide decisions about when an accommodation is needed or what kind is needed, there is always a risk that an accommodation will overcorrect or undercorrect in a way that further distorts a student's performance and undermines validity. For this reason, it cannot simply be assumed that scores from standard and accommodated administrations are comparable. Decisions about accommodations are often made on the basis of common sense judgments about the nature of the disability or linguistic difficulty and about the concepts and skills to be evaluated on the assessment. These decisions are often made on the basis of beliefs that may not be supported by empirical evidence, either because the type of empirical evidence needed is not available or because available research is not consulted. This is the case both for determining which accommodations are right for individuals and for developing policy about allowable and nonallowable accommodations.

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