Portfolios are the centerpiece of Vermont's statewide assessment program in mathematics. Portfolio scores in the first two years were not reliable enough to permit the reporting of student-level results, but increasing the number of readers or the number of portfolio pieces is not operationally feasible. (SLD)

The temporal stability and intertask consistency of an eighth-grade mathematics performance assessment and how task similarity affects the ability to generalize results of the assessments were studied with results from 101 eighth graders. Results support the suggestion that large-scale performance assessments be used with considerable caution…

Issues pertaining to the quality of performance assessments, including reliability and validity, are discussed. The relatively limited generalizability of performance across tasks is indicative of the care needed to evaluate performance assessments. Quality control is an empirical matter when measurement is intended to inform public policy. (SLD)

This paper discusses how to determine whether a test was developed in a legally defensible manner, reviewing general issues, specific cases bearing on different types of test use, some evaluative dimensions, and evidence of test quality. Tests constructed and used according to existing standards will generally stand legal scrutiny. (SLD)