NATIONAL

An article on Jan. 19 about the challenge of getting mental health treatment for someone like Jared L. Loughner, charged in the Jan. 8 shootings in Tucson, referred incorrectly to the mental health history of Seung-Hui Cho, the gunman who in 2007 killed 32 people at Virginia Tech University. Mr. Cho was ordered to seek treatment on his own and did not follow through; he was not “committed involuntarily,” which involves an extended period of forced hospitalization.  (Go to Article)

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An article on Feb. 3 about Planned Parenthood’s firing of a clinic manager who was seen on videotape advising a man posing as a sex trafficker referred incorrectly to charges against an activist known for making similar undercover videos in the offices of the community group Acorn. The activist, James O’Keefe, was charged in 2010 with entering the New Orleans office of Senator Mary Landrieu under false pretenses, with the purpose of committing a felony; he was never explicitly accused by the authorities of planning to tamper with the senator’s telephones. (The error also appeared in an article on March 27, 2010, about charges in the case.)  (Go to Article)

NEW YORK

An article on Wednesday about New York City’s plans to use sewage as a source of renewable energy misstated the amount of wastewater generated daily by New Yorkers. It is estimated at 1.3 billion gallons, not tons.  (Go to Article)

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An article on Nov. 30 about the granting of an educational waiver to Cathleen P. Black so she could become the New York City schools chancellor misidentified an official who commented on the requirement that Ms. Black appoint a chief academic officer as a condition for receiving the waiver. It was Assemblyman David I. Weprin — not his brother, City Councilman Mark S. Weprin — who said that he hoped Ms. Black’s deputy would be “more than a figurehead.” The error was pointed out shortly after the article was published; this correction was delayed because The Times failed to follow through on the complaint.  (Go to Article)

THE ARTS

An article on Saturday about the Henrietta Lacks Foundation, which was established in honor of a woman whose astonishingly hardy cancer cells have been used widely in medical research, included several errors. The foundation was formed shortly before a book about Mrs. Lacks was published last February, not “soon after.” The foundation is still in the process of applying for tax-exempt status from the I.R.S., not for “nonprofit status.” And the group has always intended to help those in need beyond the Lacks family; it does not have to “enlarge its mission” to do so.  (Go to Article)

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A television review on Wednesday about the new ABC comedy “Mr. Sunshine” misspelled the surname of an actress from the NBC sitcom “Parks and Recreation.” She is Amy Poehler, not Poelher.  (Go to Article)

SCIENCE TIMES

An article on Tuesday about a “safe injection site” for drug users in Vancouver, British Columbia, described the cost of medical care in Canada incorrectly. It is free for the poor, not free for everyone.  (Go to Article)

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Because of an editing error, the Findings column on Tuesday, about political bias among social scientists, omitted the last four words of a sentence that countered the notion that female scientists face discrimination and various forms of unconscious bias. The sentence should have read: But that assumption has been repeatedly contradicted, most recently in a study published Monday in The Proceedings of the National Academy of Sciences by two Cornell psychologists, Stephen J. Ceci and Wendy M. Williams.  (Go to Article)

OPINION

An Op-Ed article on Jan. 23, about increasing the size of the House of Representatives, misstated the year of the first Congress. It was 1789, not 1787.  (Go to Article)

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