Considerations around the measurement of cognition in large-scale cross-national surveys: Lessons from the Health and Retirement International Network of Surveys (HRS INS) and the Harmonized Cognitive Assessment Protocol (HCAP)

This paper presents key lessons on cognitive assessment from the international collaboration of aging studies. It reports challenges associated with administering cognitive tests across populations from different cultural and linguistic backgrounds and importance of maintaining consistency across time and studies, test implementation feasibility across both high-income and low- and middle-income countries, and comprehensive cognitive batteries for improved measurement precision.