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
Category: Accuracy (Discriminant Accuracy)
Accuracy describes a measure’s ability to approach the true value of the quantity being measured. Any measure has the capacity for error due to variables and conditions. For example, a scale may not be very accurate if the spring it uses is old and not as flexible as it originally was. In language testing, a test has diagnostic accuracy if it is able to distinguish between typically developing and language impaired individuals with a high degree of accuracy (at least 80% of the time).
Understanding Assessments: Reliability of Tests
Reliability is the degree of consistency of measurement in a test. A test has a high degree of reliability if it produces similar results consistently under similar conditions. Read More
Understanding Assessment: Applying Dynamic Assessment
Dynamic Assessment is a method of assessment which uses a “test-teach-retest” model. The emphasis is on the individual’s ability to acquire the skills/knowledge being tested after being exposed to instruction. Read More
