There has been exponential growth in use of the Internet to deliver therapeutic and supportive human services. Online interventions are known by a variety of names, including online practice, e-therapy and others. All refer to the delivery of services over the Internet through a variety of delivery systems including asynchronous email, video and chat communication, and closed-circuit video conferencing. They include services delivered by professionals such as psychiatrists, social workers, psychologists, counsellors and nurses as well as self-help groups with a therapeutic purpose and...