Loneliness Progression Among Older Adults During the Early Phase of the COVID-19 Pandemic in the United States and Canada.

"the data and analytic syntax are available at osf ( https://osf io/2vdsh/? data availability the study was not preregistered. the data and analytic syntax are available at osf"

"Conflicts of Interest None declared."

"Funding This work was supported by the National Institute on Aging of the National Institutes of Health grants 1R01AG057764 (to N. C. Ebner and R. N. Spreng) and R01AG068563 (to R. N. Spreng); the Natural Science and Engineering Research Council of Canada Discovery grant (to G. Turner); the University of Florida Substance Abuse Training Center in Public Health from the National Institute on Drug Abuse of the National Institutes of Health under award number T32DA035167 (to M. Horta). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health."