Timed observation
Run intervals without watching the clock
ABA interval recording should not require a clipboard, a separate timer, and a memory test. TallyFlex runs partial and whole interval recording inside the active session, and lets you pause or extend the observation without discarding completed intervals.
Use partial interval when you need to know whether a behavior happened at any point during each interval. Use whole interval when you need to know whether it stayed present for the full interval. Both are estimates: partial interval can overestimate occurrence and whole interval can underestimate duration, so follow the supervisor or BCBA guidance for clinical decisions.
Availability: Free, Solo, and Teams
UCL
Unsafe Climbing
Partial Interval
SAE
Sustained Activity Engagement
Whole Interval
The first tap starts interval recording and prepares the planned intervals. The current interval fills as time passes, while each finished interval is marked with a check or cross.
Workflow
Timed observation without losing the session
TallyFlex keeps the clock and the interval tile together, so the person collecting data can focus on observation.
Choose Partial Interval or Whole Interval when setting up the tracker.
Tap once to start interval tracking and prepare the planned intervals.
For partial interval, tap whenever the target occurs during the current interval.
For whole interval, tap only when the target stops being sustained.
Stop interval recording when needed, then continue the remaining intervals without losing completed observations.
After the planned intervals finish, start another round and keep the results in the same service record.
Why it matters
Designed for data you can actually review
Automatic intervals
The app handles the interval sequence so staff do not need to count intervals manually.
Partial and whole logic
Partial Interval records occurrence during the interval; Whole Interval records sustained behavior across it.
Flexible interval recording
Stop when the observation needs to pause, continue the remaining intervals, or start another round.
Explore next
Explore the connected workflow
Keep moving through the parts of TallyFlex that usually work together: setup, collection, supervision, review, and reporting.
Group workflows
Multi-Student Sessions
Start and switch between separate active sessions for up to 10 clients or students on Solo and Teams.
Learn moreSession setting
Observation Settings
Mark sessions by service setting, show relevant behaviors and skills, and compare graphs by setting or staff.
Learn moreSession continuity
Offline Data Collection
Collect ABA data when Wi-Fi drops, then sync automatically when the device reconnects.
Learn moreInterval Recording for ABA Sessions questions
Does TallyFlex support both partial and whole interval recording?
Yes. TallyFlex supports both Partial Interval and Whole Interval recording among its available recording methods.
Are interval methods available on Free?
Yes. Partial Interval and Whole Interval are available on Free, Solo, and Teams.
Does interval recording export to reports?
Basic CSV and Excel export are available on all plans. Generate Report output is available on Solo and Teams.
Can I continue or start more intervals?
Yes. Stop interval recording and continue only the intervals that remain, or start another round after the planned intervals finish. Completed observations stay with the service record. Use these options only when they match the measurement plan.
Keep the workflow connected
TallyFlex keeps setup, collection, review, and reporting in the same working path.