Table 2.
Technical features within intervention case studies.
| Features | Mobilyze | PC CHIP | ||
| User management | ||||
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User authentication | |||
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Study IDs, passwords | Performed by creator at randomization | Performed by creator at start of project |
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Password generation | None | Single password set for all users |
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User definition | |||
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Personal health information management | Email (within Purple Robot) | Age, gender, email (for contact) |
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Study management | |||
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Study/intervention assignment, randomization | Content released daily | Content unlocked weekly, questions released 1 hour after scheduled session, user specific permissions and group memberships |
| Content authorship/management | ||||
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Didactic content | |||
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Content editor | Used to enter and schedule release of text lessons | Used to enter text, video, and audio |
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Generic form builder | Calendar tool, active coping tool, coping card | External tools used through assessment center API |
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Content type (eg, text, images, video, audio) | Text | Text, video, audio |
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Progression (eg, sequential, non-sequential) | Sequential; new lessons available daily | Sequential; new content unlocks weekly |
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Assessments | |||
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Self-report types (checkbox, slider, text, etc) | All form types | Radio buttons only |
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Phone sensor acquisition | Various through Purple Robot | None |
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External data API access | None | WebEX (video conferencing) |
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Intra-assessment logic (sequential, adaptive, etc) | Basic (lists of questions) and advanced (scoring controls progression) | Computerized adaptive testing |
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Scoring (summing, complex algorithms) | Scoring occurs based on machine learning rules | Scoring uses Item-Response Theory (IRT) algorithms from Patient-Reported-Outcomes Measurement Information System (PROMIS) |
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BIT construction | |||
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Progression rule definition (eg, chronological, task-based, time-based, custom) | Time-based | Time-based, linked to video conferencing session |
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Custom interaction tool authorship | Form-based tools can be authored using “tool builder” | Not applicable |
| Content delivery | ||||
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Platform (phone, tablet, Web, etc) | Smartphone | Tablet |
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Connectivity (online, offline, both) | Both | Both |
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Interfaces (touch, mouse, keyboard, etc) | Touch | Touch |
| Data management | ||||
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Access | Access to data is provided about sensors using a server side database, user tool data are stored separate from sensor data | User tool usage data are accessible on the server, survey data available independently through PROMIS |
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Visualization (charting, custom, InfoVis) | Graphs, list reviews, bubble visualizations | None |