A third of all teenagers involved in the study by researchers at Britain's Cambridge University advocated so-called honor murders.

A key finding was that support for honor crimes was not connected to religious beliefs, but is far more likely in adolescent boys with low education backgrounds from traditional families.

Professor Manuel Eisner and Cambridge graduate student Lana Ghuneim interviewed more than 850 teenagers, with an average age of 15, for the study, published in the journal Aggressive Behavior.

Honor crimes can include physical assaults, rape, acid attacks and disfigurement, as well as murder.