Vanessa Feltz and other contestants in Channel 4's Big Brother reality television programme claim to have been damaged by the experience.
Speaking at the Edinburgh International Television Festival, Vanessa said there was nothing less real than reality television.
Narinder Kaur and Elizabeth Woodcock also voiced criticisms although both said they didn't regret taking part in the show.
Vanessa said: "I was edited to look like Jack Nicholson in The Shining. People go into the house thinking there are no downsides.
"In the end, you are the victim of a reality that somebody else imposes on you. The programme is the linear narrative of the producer."
Narinder Kaur, 28, from Newcastle upon Tyne, has been receiving psychiatric help, arranged by Channel 4, since she left the house six weeks ago.
She said: "Yes, I know that I should really close my front door now and just be Narinder again. But I will probably need this help for months.
"I've still got people peering in my front room at 10 o'clock every night."
Liz Warner, Channel 4's commissioning editor for Big Brother, told the festival all participants saw a psychiatrist before selection.
She said: "You are looking for people who are robust and not naive. It's not about humiliation."