| Speech and nonspeech rhythm activities | Three nonspeech activities (Build to the Beat, Keep the Beat, Beat Detective) and one speech rhythm activity (Say It on the Beat), all in one game. |
| Progressive levels of difficulty | Tiered ladders inside every activity: cue fading, simple to complex to hidden beat, simple metric to complex metric to nonmetric, and longer silences. |
| Performance based adjustment | Difficulty is set per child and per module: hit window, cue fade rate, Beat Detective level, silent beat length and tempo shift. Every change is written to the session record. |
| At least 30 minutes a day, 3 to 5 days a week, for 6 weeks | Short chunks, module rotation, streaks, a passport and a road trip map. The grown-ups area sets the daily goal, target days and study length, and adherence is logged against them. |
| Instructions, feedback and progress indicators; resume at the right level | Clear spoken and on-screen instructions, instant feedback on every tap, and progress shown on the map. A returning child resumes exactly where the adaptive engine left them. |
| Gameplay, adherence and performance data | Millisecond tap timing on the audio clock, per-trial logs, minutes per session, days per week and difficulty trajectory. See the next section. |
| Near real time researcher dashboard (Year 3) | A researcher dashboard is already running in the iPad build, with a participant summary, minutes per day, timing trends and speech samples. In Year 3 we extend it into the internal study dashboard UM describes, fed by the study data pipeline. |
| Authorized export in UM approved formats | Passcode protected export of JSON and CSV files for sessions, trials and speech. Exports carry the participant ID only. |
| IRB, privacy, security and accessibility | On-device protected storage, no network calls in the demonstration build, a study mode that isolates the intervention, and VoiceOver, Dynamic Type and Reduce Motion support. Architecture, data flow, data field and security control documentation is produced for UM review. |
| Iterative refinement from researcher, clinician and participant feedback | Every quarter of the plan has a feedback loop with the UM team. Difficulty parameters are configurable, so refinements land as settings and content, not rewrites. Updates preserve existing data. |