Validity refers to the degree to which test results accurately reflect what the test intends to measure. A language test is valid if it is believed to measure language ability based on evidence and consensus. Three important types of validity contribute to overall validity: construct validity, content validity, and concurrent validity.
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This study proved that measures other than standardized language assessments can more accurately identify language impairment in culturally and linguistically diverse children (in this case monolingual Spanish speakers). Read More
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This book addresses the constellation of factors that have contributed to the misidentification of minority/culturally and linguistically diverse children as needing special education services. It also provides suggestions for improving the special education referral process.
Source URL: View this document on the ASHA website
Authors conducted a meta-analysis of diagnostic studies for language impairment in bilingual children. They found a serious lack of necessary psychometric measures in the vast majority of studies examined.
In this module, Cate introduces how to appropriately assess preschoolers for disabilities without the use of test scores. Read More
In this module, Cate discusses the validity of standardized tests and whether they measure what they claim to measure. Read More
In this module, Cate explains two types of reliability (test-retest and inter-examiner) in terms of standardized tests. Read More
A standard deviation (SD) is a quantity derived from the distribution of scores from a normative sample. The standard deviation is the average distance (or deviation) from the mean. Read More
The terms normative sample and standardization sample refer to the same concept and are often used interchangeably, though standardization sample is the term more frequently used in statistics and normative sample is more common within psychometrics. A norm referenced test uses a normative or standardization sample from the general population to determine what is “typical” or “normal” in that population. Read More
The LEADERSproject by Dr. Catherine (Cate) Crowley is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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