Cross-battery assessment (XBA) approach was first introduced in the late 1990s by Dawn Flanagan, Samuel Ortiz, and Kevin McGrew. It offers practitioners the means to make systematic, valid, and up-to-date interpretations of intelligence batteries and augment them with other tests in a way that is consistent with the empirically supported Cattell–Horn–Carroll (CHC) theory

CHC Theory

Recent advances in current theory and research on the structure of human cognitive abilities have resulted in a new empirically derived model commonly referred to as the Cattell–Horn–Carroll theory of cognitive abilities . CHC theory of cognitive abilities is an amalgamation of two similar theories...

of cognitive abilities. XBA is a time efficient method to reliably measure a wider (or more in-depth but selective range) of cognitive abilities/processes than any single intelligence battery can measure.