A majority of female professionals who haven’t experienced or witnessed sexual harassment in the workplace say they don’t believe it’s commonly happening, according to a survey of more than 5,000 workers released Oct. 15.

The study’s results show that many women are still afraid to report abuse, according to Elizabeth Alexander, a senior managing director in strategic communications at FTI Consulting.

“Women who haven’t seen it, or say it hasn’t happened to me, they don’t think it’s a problem,” Alexander said in an interview. That’s because those that did are keeping it to themselves, she said. “It’s this vicious cycle...