Western Psychological Services, a publishing company based in Los Angeles, owns many of the common autism screening and diagnostic instruments. These include the Social Responsiveness Scale (SRS), a widely used screening questionnaire that Constantino developed, as well as the Autism Diagnostic Observation Schedule (ADOS) and the Autism Diagnostic Interview-Revised (ADI-R), often referred to as the gold-standard tests for diagnosis of the disorder.
Each time one of these tests is administered, the publisher charges a fee, and passes a portion of the royalties on to the test’s developers.
“I don’t think there’s any other condition in medicine in which you have to pay a royalty to a publishing company in order to make the diagnosis,” says David Skuse, professor of behavioral and brain sciences at University College London. Skuse has helped develop two freely available tools, the Social and Communication Disorders Checklist (SCDC) and the developmental, dimensional and diagnostic interview (3di).
In many countries, paying royalties of even a few dollars represents a substantial hardship. Durkin and others say these costs not only limit access to diagnosis for individuals, but also forestall epidemiological studies, which require surveying thousands of individuals.
One reason researchers have traditionally turned to publishers is a lack of alternative distribution channels, Durkin says. A new online clearinghouse of information, DisabilityMeasures.org, attempts to address this issue by gathering free diagnostic tools for developmental disabilities such as autism.
