Aberrant behavior refers to any type of unusual behavior that would not be expected under normal circumstances. In educational and psychological testing, such behaviors have the potential to severely bias the aberrant examinee's test score while also jeopardizing the test scores of countless others. It is therefore crucial that aberrant examinees…

This National Academy of Education (NAEd) volume provides guidance to key stakeholders on how to accurately report and interpret comparability assertions concerning large-scale educational assessments as well as how to ensure greater comparability by paying close attention to key aspects of assessment design, content, and procedures. The goal of…

In his thoughtful focus article, Haertel (this issue) pushes testing experts to broaden the scope of their validation efforts and to invite scholars from other disciplines to join them. He credits existing validation frameworks for helping the measurement community to identify incomplete or nonexistent validity arguments. However, he notes his…

Longitudinal change in the average Z scores for four groups of pupils sorted by quartiles was examined for its stability over three years. The data, collected from 1998 to 2009, was obtained from nine cohorts of Japanese junior high school pupils totaling 1,962 subjects. It showed illusionary declines among the mid-range pupils but improvements…

Validation research for educational achievement tests is often limited to an examination of intended test score interpretations. This article calls for an expansion of validation research in three dimensions. First, validation must attend to actual test use and its consequences, not just score meaning. Second, validation must attend to unintended…

The reporting of scores on educational tests is at times misunderstood, misinterpreted, and potentially confusing to examinees and other stakeholders who may need to interpret test scores. In reporting test results to examinees, there is a need for clarity in the message communicated. As pressure rises for students to demonstrate performance at a…

The rank-ordering method for standard maintaining was designed for the purpose of mapping a known cut-score (e.g. a grade boundary mark) on one test to an equivalent point on the test score scale of another test, using holistic expert judgements about the quality of exemplars of examinees' work (scripts). It is a novel application of an old…

As more colleges move to "test optional" admissions policies, the debate over the utility and interpretation of standardized-test scores continues. In this article, the author interviews Daniel Koretz, a professor of education at Harvard University and author of "Measuring Up: What Educational Testing Really Tells Us". Koretz…

ACT is often asked whether student scores on the ACT[R] test can be used to make "norm-referenced" or "standards-referenced" comparisons. Norm-referenced interpretations compare students to one another, while standards-referenced interpretations measure student performance against predefined content standards. This brief shows…

Validity is a critically important issue with far-reaching implications for testing. The history of conceptualizations of validity over the past 50 years is reviewed, and 3 important areas of controversy are examined. First, the question of whether the three traditionally recognized types of validity should be integrated as a unitary entity of…

Issues regarding confidence and tolerance intervals are discussed within the context of educational measurement. Conceptual distinctions are drawn between these two types of intervals; and examples, under various error and true score models, are used to compare such intervals. It is shown that there tend to be only small differences in tolerance…

Tests and assessments are generally administered to gather data to aid in decision making, with at an individual student level or at an aggregated level. In order to incorporate assessment data in informed decision making, test users need to understand the test results. This chapter highlights the types of test scores and test score…

This brief introduction to testing is geared to parents. Types of tests are defined, such as standardized tests, achievement tests, norm referenced tests, criterion referenced tests, and aptitude tests. Various types of scores (grade equivalent, percentile rank, and stanine are also defined, and the uses made of tests by administrators, teachers,…

Three key areas are outlined dealing with the development of public understanding of testing: (1) Why tests are administered in schools: needs assessment, instructional program evaluation, materials selection, reporting to public, documenting individual growth, diagnostic analysis and planning, and instructional grouping. (2) Types of tests used,…

Although agreeing that the System of Multicultural Pluralistic Assessment (SOMPA) has an important purpose, the author questions some perceived weaknesses: test validity; medical model measures; sociocultural scales; estimated learning potential (ELP); and the incompleteness of SOMPA manauls for use in evaluating the system. (See also TM 504 174).…