Four problems of data summary and analysis in the Concept Attainment Abilities Project are discussed. The problems are: (1) scoring and item analysis for items that exist in a completely crossed design; (2) determining the factorial structure of such item sets; (3) reducing the battery of 56 cognitive abilities tests administered in 1970 to approximately 30 tests; and (4) identifying relationships between the battery of concept attainment measures and the battery of cognitive abilities tests. (DB)