ABA Exam CoachLessons · C. Measurement, Data Display, and Interpretation
C.3 · Measuring occurrence: count, frequency and rate
Eighteen responses on Monday, twelve on Tuesday. Did the behavior go down? Not necessarily, and by the end of this video you'll know exactly why.
Key takeaway
A count only means something when you know how long you watched. For free operants, divide the count by the observation time to get rate. In Cooper, "frequency" means rate, not raw count. When someone else controls the opportunities, like discrete trials or worksheet items, report a percentage of opportunities, and always keep track of how many opportunities there were.
A count only means something when you know how long you watched. For free operants, divide the count by the observation time to get rate. In Cooper, "frequency" means rate, not raw count. When someone else controls the opportunities, like discrete trials or worksheet items, report a percentage of opportunities, and always keep track of how many opportunities there were.
Members get the full lesson video, notes and a 5-question test
The video walks through the idea, worked examples, the trap people fall into and an exam-style question. The notes and the checkpoint come with it, and your results feed your Where to focus plan.