Journal of Prevention of Alzheimer's Disease, 8(3), 257-262. Springer International Publishing AG The journal of prevention of Alzheimer's disease A4 Study Team 2021, ' Item-Level Investigation of Participant and Study Partner Report on the Cognitive Function Index from the A4 Study Screening Data ', Journal of Prevention of Alzheimer's Disease, vol. 8, no. 3, pp. 257-262 . https://doi.org/10.14283/jpad.2021.8