Repertory Grids as Mental Tests: Implications of Test Theories for Grids

As repertory grids are often used in the making of important decisions about people's lives, it seems reasonable to demand that the technique accurately reflect the mental structure and processes of the person. This need has not gone unnoticed, either by proponents of the grid technique or its critics, but their calls for psychometric rigor are couched in terms of reliability and validity, terms that have specific operational meanings, and have been derived from the theories proposed for standard psychological tests. This article examines the bases and structures of such theories in the context of repertory grid data