Anne Marie Singer, who has been a longtime New York newspaper critic, is leaving the paper.

Ms. Singer, whose most recent column was on Sunday, is scheduled to leave the paper on Jan. 4.

“I’m a longtime critic, but I’m a writer, not a public speaker,” she said.

Ms, Singer said she had hoped to remain in the Times for decades.

But she said she wanted to spend more time with her family.

Ms., Singer said in an interview that she had a hard time getting her voice out of her mouth, especially after losing a friend in the Sept. 11, 2001, terrorist attacks.

She was diagnosed with Stage 4 cancer last summer.

She has written columns for the Times since 1988.

“In my opinion, the Times has been at the forefront of American journalism in terms of journalistic excellence, but it has been unable to live up to its ideals,” Ms. Simmons said.

The Times said in a statement: “Anne Marie is a brilliant journalist and a gifted writer, but she will be missed by many, especially by those who knew her best.”

She was born in New York City and grew up in Florida.

Her father was a former chairman of the Times Company and she grew up knowing that she would grow up to be a New York native.

“Annie had a life of joy, and that was a blessing,” her brother, Michael, told the Times.

“She had such a wonderful family.

She lived a life that was extraordinary.”

Mr. Singer said his sister was a “very kind and loving person” and that she loved her family, and she had never felt pressure to conform to social norms.

Ms.- Singer’s resignation comes less than a week after the Times announced that it would end its relationship with its first black columnist, Meghan McCain.

She had been hired to write a column for the paper’s new online-only paper, the Sunday New York edition.

The move followed a Times decision last week to hire a white editor to write the online version of The New York Observer, an influential weekly newspaper that was launched in 2012 by a black reporter and has been critical of the paper in the past.

“While we will miss Meghan, we look forward to continuing to publish the Observer’s strong journalism, and to continuing the mission of journalism at the Times,” a statement said.

“Meghan McCain is the right person for the job, and we thank her for her contributions to The Times.”

Ms. McCain is also set to be named a contributing editor to the paper next week, as the paper gears up to publish a new column by its first African-American editor, the paper announced.