This Notice of Funding Opportunity (NOFO) invites applications to continue critical ongoing network and infrastructure support for advancing development in a specific high-priority area of behavioral and social research on Alzheimers disease (AD) and AD-related dementias (ADRD): The Harmonized Cognitive Assessment Protocol (HCAP) International AD/ADRD Research Network. Network/infrastructure-building activities include but are not limited to meetings to develop novel research areas and interact on the development of infrastructure; small-scale pilots to test or tailor measures in new populations or contexts; development of guidance on selected topics such as biomarkers, diagnosis and classification of dementia, protocol development, fieldwork challenges, statistical harmonization, and analytic methods; educational activities such as intensive summer institutes, series of workshops and related network activities, or advanced seminars on methodology; dissemination and outreach activities; and coordinate activities with other related networks on AD/ADRD.