This was one of the first of many articles publishing research demonstrating the severe limitations of using commercially available child language tests when assessing children for speech and language disability.
This article demonstrates how many standardized tests do not even provide information about validity and reliability.
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).
A standard deviation (SD) is a quantity derived from the distribution of scores from a normative sample and can be defined as the average distance (or deviation) from the mean.
The terms normative sample and standardization sample refer to the same concept and are often used interchangeably. A norm referenced test uses a normative or standardization sample from the general population to determine what is “typical” or “normal” in that population.