The article notes that what it describes as an "authentic connection to pain" provided a powerful atmosphere on set. "There wasn't a person who was working on the movie who didn't have a personal connection," Jolie said.
"They weren't coming to do a job. They were walking in the exodus for the people they had lost in their family, and it was out of respect for them that they were going to recreate it. It completed something for them."
She told the journalist that some of the cast and crew had flashbacks and nightmares, and so a therapist was on set every day. She also mentioned how even bystanders were traumatised.
"When the Khmer Rouge came over the bridge, we had a people who really dropped to their knees and wailed. They were horrified to see them come back," she said.
The revelations about her casting methods were met with outrage on social media.
Jessica Roy, news editor for New York Magazine's The Cut section, noted: "Angelina Jolie cast her latest movie by taunting poor children with cash."
Another woman added: "Why in the hell were Angelina Jolie and co traumatising poor Cambodian children for 'casting'? How is this applause worthy?"
Jolie used the rest of the interview to explain how she began the project only after consulting widely with Cambodians, and approaching the Culture Ministry.
The 42-year-old, who has Cambodian citizenship after filming Tomb Raider in the country and falling in love with it, won over the Cambodian authorities.
They allowed her to shut down the town of Battambang for days, gave the film-makers permits to land in remote zones, and provided them with 500 officials from their actual army to play the Khmer Rouge army. About 3500 Cambodians participated as cast and crew, and the world premiere was held in Siem Reap, amid the ruins of Angkor Wat.
"It's not a poetic thing to say [this film] was made by the country," she said.
Jolie's representatives did not respond to a request for comment.