Chapter 9 Reliability and NBPTS assessments

This chapter discusses the reliability of the NBPTS assessments. In order to meet the challenge of ensuring reliability of a complex performance assessment, particular attention was given to the design of the assessment and scoring processes. Several models for considering and determining the reliability of the assessment are also introduced. Results from two assessment cohorts are presented. These results demonstrate that the design features of the NBPTS system support a relatively reliable set of assessments without compromising the complexity of the teaching performance it was designed to assess.