Data Collection and GraphingDifficulty 2/5
During a 20-minute session an RBT records that a learner asks for help 8 times. Which measure has the RBT collected, and what is the rate?
- AFrequency; 0.4 responses per minute
- BLatency; 2.5 minutes
- CPartial-interval; 40% of intervals
- DDuration; 8 minutes
Show answer and rationale
Correct: A. Counting every instance is frequency (a continuous measure). Rate converts the count to a standard time unit: 8 ÷ 20 minutes = 0.4 per minute, which lets sessions of different lengths be compared.
- D — Duration measures how long each response lasts, not how many occurred.
- B — Latency is the time from the instruction to the start of the response.
- C — No intervals were used; the RBT counted each instance.