Table 1.

The evaluation criteria for interaction.

Criteria	Description
Communication	In which degree is there a direct interaction between the patient and therapist? Is the communication asynchronous or synchronous, automated feedback?
Communication mechanism	What kind of communication mechanisms are used? i) Video ii) Telephone iii) Email iv) Chat/SMS
Functionality	What kind of functiionality is supported? i) Chat ii) Exercises iii) Forum iv) Questionnaires v) Diary vi) Video lectures vii) Audio lecture viii) Animation
Roles	Which roles do the systems support? i) Patient and therapist ii) Group therapy (many patient and one therapist)