The airline said Tuesday it was planning to hire a chief inclusion and diversity officer, and establish an office for “diversity, equity and inclusion.”

“Based on our engagement with the company, they have begun to make progress,” Derrick Johnson, president and chief executive of the N.A.A.C.P., said Tuesday of the airline’s past efforts.

Mr. Johnson said the N.A.A.C.P. wanted to get all the facts about what happened to Dr. Rowe.

“We are going to monitor to see the airline’s response,” Mr. Johnson said.

The day of the encounter, June 30, was a hot one: The temperature in Kingston, Jamaica, had a high of 94 degrees, and the high in Miami was 89 degrees, according to the National Oceanic and Atmospheric Administration.

Dr. Rowe said she was walking to her seat when a male flight attendant, whom she described as black, asked her to return to the front of the plane. Another flight attendant, who was also black, then spoke to her about her appearance while she stood on the jet bridge, Dr. Rowe said.

“She poses the question to me, ‘Do you have a jacket?’” Dr. Rowe said. “I said, ‘No, I do not.’ I’ve been given no explanation as to why I was taken off the plane. So finally she says, ‘You’re not boarding the plane dressed like that.’ Then they started to give me a lecture about how when I got on the plane, I better not make a scene or be loud.”

The airline’s conditions of carriage, which are posted on its website, make a brief reference to a dress code: “Dress appropriately; bare feet or offensive clothing aren’t allowed.”