Yale University said on Monday that it would not allow a senior to participate in a campus art exhibition unless she made a written statement that her “performance,” in which she repeatedly inseminated herself and then induced miscarriages, was a fiction that she had concocted. In an article on Thursday in The Yale Daily News, the student, Aliza Shvarts, right, was quoted as saying that she had inseminated herself “as often as possible” over several months while taking herbal drugs to induce miscarriages, which she recorded on video to display for her senior-year art project at a show beginning on campus on Tuesday. Her claim drew intense criticism. Yale said last week that Ms. Shvarts had told three university officials that she had not inseminated herself or induced abortions but had made up the story as part of the project. On Friday, however, Ms. Shvarts insisted she had really experienced “repeated, self-induced miscarriages,” although she said that she had not known if she was actually pregnant. Yale officials said the denials were part of the continuing art performance, and on Monday demanded that it end. Peter Salovey, the dean of Yale College, and Robert Storr, dean of the School of Art, also said that they had found “serious errors of judgment” on the part of Ms. Shvarts’s adviser and an art instructor who knew of the project. They did not identify the adviser or instructor, though Ms. Shvarts has said that her adviser was Pia Lindman. Mr. Salovey said that “appropriate action” had been taken against the two teachers, but did not elaborate. Neither Ms. Shvarts nor Ms. Lindman could be reached for comment.