From RAINNs Methodology (https://www.rainn.org/about-rainns-statistics)
"The National Crime Victimization Survey is the primary source of data on RAINN's site."
It's a survey. It says it right there.
From the Bureau of Justices website, the agency that administers the NCVS
"The NCVS is a self-reported survey that is administered annually from January 1 to December 31."
It's a self reported survey. All of the scientific rigor of a facebook poll.
(https://bjs.ojp.gov/data-collection/ncvs#:~:text=The%20NCVS%20is%20a%20self,in%20which%20they%20were%20interviewed.)
From RAINNs Methodology (https://www.rainn.org/about-rainns-statistics) "The National Crime Victimization Survey is the primary source of data on RAINN's site." It's a survey. It says it right there. From the Bureau of Justices website, the agency that administers the NCVS "The NCVS is a self-reported survey that is administered annually from January 1 to December 31." It's a self reported survey. All of the scientific rigor of a facebook poll. (https://bjs.ojp.gov/data-collection/ncvs#:~:text=The%20NCVS%20is%20a%20self,in%20which%20they%20were%20interviewed.)