ABSTRACT
This chapter discusses the issues involved with combining multiple predictors. It considers two special cases of multiple assessments, that is, individual assessment and group assessment centers that usually include assessments of performance on specially developed exercises. Assessment tools for individual assessors usually include personal history data, ability tests, personality and interest inventories, interviews, and often projective devices. The distinguishing feature of individual assessment, of course, is that it assesses one person at a time. Some varieties of assessment procedures are briefly discussed here, but the list is not at all exhaustive. Developers of assessment centers, perhaps even more than developers of other assessment methods, need to be extraordinarily precise in presenting their dimension definitions to the raters who must use them. In-Basket tests, for example, became widely used assessment center exercises not because of superior reliability or predictive power but because they tap the everyday decision-making skills of managerial work.
