Just minutes after Christine Blasey Ford, a California-based psychologist went public with accusations of teenage sexual assault against Judge Brett M. Kavanaugh, the Supreme Court nominee, internet investigators began combing her past for clues about her possible motives and trying to cast doubt on the veracity of her claims.

Since then, Dr. Blasey, as she is known professionally, has been the subject of a torrent of misinformation online. Some viral rumors about Dr. Blasey have been quickly debunked. But false claims have continued to spread on Facebook, Twitter, Reddit, and other social networks.

Here are several of the most visible false and misleading claims about Dr. Blasey, along with explanations of what’s really happening.

Claim: Dr. Blasey’s students left negative reviews on her RateMyProfessors.com profile, calling her “unprofessional” and citing her “dark” personality.

Verdict: False.

This viral rumor is based on a case of mistaken identity. The RateMyProfessors.com page on which these negative reviews were found is about Christine A. Ford, a professor of human services at California State University Fullerton. Christine Blasey Ford, Judge Kavanaugh’s accuser, teaches at Palo Alto University.

This story made an early appearance on Grabien, a little-known news website. It was then picked up by several right-wing media outlets, including by the Fox News host Laura Ingraham, who tweeted a link to it, and the Drudge Report, which featured it on its homepage. Grabien later issued a correction and published an editor’s note apologizing for the error. But the article remained online, and several other websites have since picked it up.

Claim: Judge Kavanaugh’s mother once ruled against Dr. Blasey’s parents in a foreclosure case.

Verdict: False.

Internet sleuths quickly zoomed in on a 22-year-old civil court case involving Judge Kavanaugh’s mother, Martha Kavanaugh, a district court judge in Maryland, in which Dr. Blasey’s parents, Ralph and Paula Blasey, were the defendants. Judge Kavanaugh, some said, had ruled against the Blaseys, costing them their house and creating a revenge motive for Dr. Blasey.

There was, in fact, a 1996 foreclosure case involving Martha Kavanaugh and Dr. Blasey’s parents. But according to CBS News, the Blaseys settled with their bank, and Judge Kavanaugh dismissed the case. Citing court records, Snopes noted that Judge Kavanaugh’s ruling actually allowed the Blaseys to keep their home.

But the story nevertheless made it onto conservative news sites including Gateway Pundit, which used the headline “Bad Blood: Judge Kavanaugh’s Mother Foreclosed on Far Left Accuser’s Parents’ Home.” The story has not yet been corrected.

Claim: Dr. Blasey made similar sexual assault accusations against Justice Neil Gorsuch during his nomination process.

Verdict: False.

This claim seems to have originated with a Twitter user, Josh Cornett, who appears to have a history of amplifying right-wing misinformation. (The user’s account has tweeted messages of support for QAnon, a sprawling pro-Trump conspiracy theory.)

On Tuesday, Mr. Cornett, referring to Senator Dianne Feinstein, a California Democrat, tweeted: “According to sources Diane [sic] Feinstein’s reluctance to mention the Kavanaugh accuser’s letter during confirmation session is because the accuser sent a similiar [sic] letter directed at Judge Gorsuch last year.” In a follow-up tweet, he said that he had “no idea” if the information was true, but that “my source has been very accurate in the past.”

There is no known letter sent by Dr. Blasey about Justice Gorsuch, or any other Supreme Court justice. Still, the tweet got more than 7,000 retweets.

Claim: Dr. Blasey is a major Democratic donor with a long history of left-wing activism.

Verdict: Mostly false.

Some critics of Dr. Blasey quickly painted her as a devoted left-wing activist and donor with an ax to grind.

They have claimed that she wrote on Facebook in 2016 that “Scalia types must be banned from law.” Another variant of this claim also has her writing that “Scalia types must be banned from courts.”

Neither phrase appears in a search of public Facebook posts in 2016. It’s possible that the phrases appeared in posts that have since been deleted from Dr. Blasey’s accounts. But these claims don’t contain links to old posts or any other form of attribution. The account of the Twitter user who appeared to originate the claim, @LodgeNixon, has since been deleted, and no evidence of the purported Facebook post has emerged.

Memes containing this dubious claim, and several others about Dr. Blasey, have gone viral on Facebook, and have been shared inside several large private Facebook groups.

It is no secret that Dr. Blasey is a registered Democrat who has given money to progressive organizations and campaigns — these facts were reported by the The Washington Post in the original story naming her as Mr. Kavanaugh’s accuser. But she appears to be far from a big-money donor. According to data from the Federal Election Commission, her donations to Democratic committees and campaigns from 2013 to 2017 total less than $100.

In addition, a photo that circulated on social media that purported to be Dr. Blasey holding a “not my president” sign at an anti-Trump rally appears to be misleading. The photo appears on a stock photo website, and the woman in the photo is not identified. Dr. Blasey did attend a California Women’s March in 2017, according to The Mercury News. But the photo below was taken at a march in New York in2016, according to Alamy, the stock photo website.

Claim: Dr. Blasey’s brother worked at a law firm with ties to the Russia investigation.

Verdict: Misleading.

In a news release, Liberty Counsel, a conservative legal group, said that Dr. Blasey was an unreliable accuser because of her family ties to the special counsel investigation into Russian interference in the 2016 election.

The group wrote:

Ford has a brother, Ralph Blasey, who worked for Baker Hostetler, a law firm that retained Fusion GPS, the infamous DC company that produced the unverified Steele dossier on President Donald Trump and Russia, sparking the Russia investigation.

The group’s theory, which quickly caught on among internet conspiracists, was that BakerHostetler, the law firm where Dr. Blasey’s brother worked, had once hired a consulting firm called Fusion GPS as part of a Russian money-laundering investigation. Several years later, Fusion GPS subcontracted with a British intelligence officer, Christopher Steele, to produce the infamous Russia dossier. Therefore, they implied, Dr. Blasey’s brother was connected to the Russia investigation.

And according to his LinkedIn profile, Mr. Blasey left the firm in 2004, more than a decade before any investigation into Russian collusion began.