These data were collected during the initial evaluation of the International Cognitive Ability Resource (ICAR) project. ICAR is an international collaborative effort to develop open-source public-domain tools for cognitive ability assessment, including tools that can be administered in non-proctored environments (e.g., online administration) and those which are based on automatic item generation algorithms. These data provide initial validation of the first four ICAR item types as reported in Condon & Revelle . The 4 item types contain a total of 60 items: 9 Letter and Number Series items, 11 Matrix Reasoning items, 16 Verbal Reasoning items and 24 Three-dimensional Rotation items. Approximately 97,000 individuals were administered random subsets of these 60 items using the Synthetic Aperture Personality Assessment method between August 18, 2010 and May 20, 2013. The data are available in rdata and csv formats and are accompanied by documentation stored as a text file. Re-use potential includes a wide range of structural and item-level analyses.