Louise Mewton of the University of New South Wales in Australia, the lead author of that research, worries that the DSM-5 will pathologize normal behavior.

CNN: STORY HIGHLIGHTS

There still is a need for scientists and clinicians to speak a common language in order to carry out clinical research, and the role of the DSM in aiding this communication won't change in the near future, said Dianne Chambless, a psychology professor at the University of Pennsylvania who studies anxiety treatment.

WSJ: Revised Psychiatric Manual Faces Mixed Reviews

"The development of DSM-5 began with an unprecedented process of research evaluation that included a series of white papers and 13 scientific conferences supported by the National Institutes of Health, " wrote Dr. David Kupfer, chairman of the University of Pittsburgh School of Medicine, who oversees the entire DSM-5 task force, in an e-mail.

CNN: Are we over-diagnosing mental illness?

Some experts have accused the DSM task force of making too many major changes with limited research evidence, such as eliminating Asperger's syndrome as a stand-alone diagnosis and subsuming it under an autism-spectrum disorder label.

WSJ: Revised Psychiatric Manual Faces Mixed Reviews

The DSM is supposed to reflect the current knowledge in the field and some of the latest research is too new to use as a basis for changing the framework of how mental illness is diagnosed, say DSM leaders.

WSJ: Revised Psychiatric Manual Faces Mixed Reviews

Research suggests that hoarding should be listed as a unique disorder in the latest diagnostic manual (DSM-V) of the American Psychiatric Association.

FORBES: The Mysterious California Case of a Bank Robber Turned Explosives Hoarder