Criterion-referencing is a way to enhance the interpretation of test scores by referencing them to well-defined behavior domains. Behavior domains may be ordered or unordered; several varieties of criterion-referenced tests within each of these types are discussed. (Author/RL)

Latent trait models provide a new scale for reporting educational and psychological measurements. Characteristics, interpretations, and uses of these scales are considered. (Author/RL)

With psychometric tests (that is, norm-referenced tests), nearly all scores fall into one of three categories: those based on comparison with an absolute standard; those based on inter-individual comparison; or those based on intra-individual comparison. These are described and all commonly used metrics are discussed. (Author/RL)

This chapter discusses units of measurement, relates types of scales and norms to the purpose for testing, looks at types of test data typically reported, identifies the primary users of test information, looks at limitations of scales and norms, and looks at the interaction between user and data. (Author/RL)