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The British Psychological Society, a professional group, helped design the training received by the class instructors.

The society's David Murphy, however, said the classes might not be a fit for everyone.

"Some people are wary about going to a class instead of seeing a psychologist," said Murphy, who isn't involved with the program.

The classes often require more effort by the individual than working with a psychologist, he said.

"For the (self-help) classes to be effective, the onus is on the patient to change what they're doing in between sessions," Murphy said.

Some American experts weren't sure the approach would work in the United States.

"The expectations of treatment are very different in the U.S.," said Michael Otto, a professor of psychology at Boston University who has studied self-help approaches. "People think, 'if I'm going to be paying for care, I want to get the treatment I want and that's often personal therapy."

Otto said the downside to such self-help programs is that people who don't get better might just give up.

Instructor Nabila El-Zanaty said the classes aren't meant to be like group therapy.

"It's more like psychological education," she said, after leading a session that taught participants how to spot negative thoughts about themselves.

She said patients must be monitored closely in case they need more intensive help. At the start of every class, they fill in a survey about their recent behavior, including whether they have hurt themselves or had suicidal thoughts.

El-Zanaty said she's been surprised by how much the participants are willing to share in class.

She said one woman who cried during every session and talked about suicide attempts was referred to personalized therapy.

Most courses run about eight to 12 weeks. El-Zanaty said they check in with participants a month after the classes end. After three months, they can apply to do another course if they still need help.

Ferguson and her classmates in El-Zanaty's course realize it's up to them to make sure the classes work.

"They only give us the tools," she said. "I know if I don't practice the techniques, it will be back to square one."