Table 1.

Types of interactivities that can be used in behavioral health apps.

Type of interactivity	Definition of interactivity
Human-to-data	Provides and retrieves self-recorded data about behavior and symptoms, such as daily alcohol usage.
Human-to-human (peers or provider)	Human interactions mediated by computer systems (eg, community boards and direct messaging) with peers (or community of users) or with providers, defined as a coach, paraprofessional, or professional.
Human-to–artificial intelligence	Users interact with an artificial intelligence, such as a chatbot, to provide therapeutic support.
Human-to-algorithm	Users interact with software logic and protocols, allowing for personalization of the app or gaming. Can use multiple sensorimotor, motivation, and persuasion elements and supports cognitive processes.
Interactive smartphone modalities	Involves haptics, gestures and movement, locations, scan-and-tilt, point of view and head tracking, multitouch and video projection, context and proximity sensing and auditory input, and even augmented reality.