(Spaulding, Plante, & Farinella, 2006) Eligibility Criteria for Language Impairment: Is the Low End of Normal Always Appropriate?
This article demonstrates how many standardized tests do not even provide information about validity and reliability.
Understanding Assessment: The Importance of Understanding the Confidence Interval
The confidence interval is a range of values surrounding the score obtained from the administration of a standardized test.
Understanding Assessment: Understanding the Normal Distribution
A normal distribution, also called a bell curve, occurs when variables (i.e., test scores) plotted on a graph fall into a regular distribution around a single mean. In a normal distribution, about 96% of the scores will fall within 2 standard deviations of the mean.
Understanding Assessment: Standard Deviation
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.
