In a press conference the two US citizen released from Islamic Republic prison talked about their experience inside the prison:

By Tina Susman, Los Angeles Times
September 26, 2011
Reporting from New York— In a no-holds-barred statement, two Americans who spent 781 days in an Iranian prison on spying charges called themselves hostages of sour U.S.-Iranian relations and described the screams of prisoners being beaten, the mental manipulation of their jailers, and how they lived in "a world of lies and false hope" until their sudden release last week.
Read the story:
http://www.latimes.com/news/nationworld/nation/la-na-iran-hikers-20110926,0,3831089.story