Table 3.

The 3 distinct functions that characterize mental health professional digital tool use in client interaction. The functions can be served through analog, digitized, or digital solutions, of which examples are provided.

	Medium
Function	Analog	Digitized	Digital
Communication	Face-to-face interaction and written letters	Telephone, emails, messaging, and teletherapy with audio and video connection	Teletherapy with advanced features such as virtual reality and avatars
Diagnosis and evaluation	Pen-and-paper questionnaires and psychological tests	Sending questionnaires via email and filling questionnaires on the web	Responsive and gamified tests and integration of various data sources
Creating therapeutic change	Brochures, printed materials, and handouts	Sharing materials via email or through web-based information portals	Interactive DMHIsa, mobile apps, and serious games

^aDMHI: digital mental health intervention.