A short decision guide for picking the data collection method that actually fits the behavior, instead of defaulting every goal to a points system. It walks through frequency, duration, interval, and ABC data, when each one fits, and how the choice decides which chart format will make logging easy.
Frequency: when you can count discrete events
Use frequency when the behavior has a clear start and stop you can tally, like calling out, raising a hand, or requesting a break. It works best when the events are not so constant that counting becomes a full-time job. If the behavior happens dozens of times an hour, consider interval sampling instead so logging stays realistic.
Duration: when how long matters more than how often
Use duration for behaviors where the length is the point: time on task, time in the calm corner, or how long a tantrum lasts. Duration answers questions a simple count cannot, such as whether episodes are getting shorter even if they happen as often. It fits a goal worded around staying engaged or returning to work within a set time.
Interval and momentary sampling: for continuous behaviors
When a behavior is near-constant or hard to bound, sample it: check at set intervals whether it is happening rather than catching every instance. This keeps logging feasible for behaviors like off-task or stereotypy that would overwhelm a frequency count. It trades a little precision for data a busy teacher can actually keep.
ABC data: when you need the why, not just the how much
Reach for ABC notes when the team's question is about function, not rate: what tends to happen before the behavior and what follows it. ABC data drives FBA and BIP work, so it belongs alongside the daily chart rather than in a separate document. In Evident, logging it as incidents tied to the student keeps the context next to the trend.
Let the method pick the chart
Once you know the method, the chart format usually follows: a counter for frequency, a timer or duration field for duration, a sampling check for interval, and an incident note for ABC. Choosing the method first is how you avoid a goal nobody can log consistently. If staff cannot score it during a normal day, change the method before you change the student.