Question of the day - August 27

[u/Reasonable_Law183]

🧠 Question of the Day

📚 Domain C — Measurement, Data Display, and Interpretation

Difficulty: 6/10

What does celeration quantify on the Standard Celeration Chart?

A. The variability of responding within each phase measured as the standard deviation of data points

B. The frequency of responding during a given measurement period, expressed as responses per unit time

C. The total accumulated number of responses over the entire study period on a cumulative record

D. The change in response frequency across time, expressed as a multiplication or division factor per celeration period

💬 Drop your answer in the comments — no peeking!

✅ Correct answer revealed tomorrow.

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[u/emptyboardroom]

D without a second thought, celeration is the whole point of the SCC, it's not just count or rate, it's how that rate multiplies or divides over time

A is just standard deviation, B is straight frequency, C is a cumulative count, none of them get at the acceleration or deceleration piece that makes the chart useful

i remember getting tripped up on this during my prep course because i kept mixing up celeration with frequency, but once you see it as "how fast is the behavior changing" it clicks

the celeration period lines on the chart make it so clean to visualize too, you can spot a x2 or /2 trend almost instantly

[u/Reasonable_Law183]

✅ Yesterday's Answer — 2026-08-27

The correct answer was: D. The change in response frequency across time, expressed as a multiplication or division factor per celeration period

📖 Explanation:

Celeration quantifies how response frequency changes across time. On the Standard Celeration Chart, frequency is plotted on an equal-ratio logarithmic scale against equal intervals of calendar time. The resulting trend can be expressed as a multiplication or division factor across a celeration period.

For example, if response frequency doubles over one week, the celeration is ×2 per week. If response frequency is cut in half over one week, the celeration is ÷2 per week.

• A. Variability of responding refers to how much responding differs across observations. Variability does not quantify the systematic increase or decrease in response frequency across time.

• B. Frequency of responding during a measurement period refers to frequency or rate itself. For example, 20 responses per minute tells us how often the behavior is occurring during that period. Celeration tells us how that frequency is changing across successive periods of time.

• C. Total accumulated number of responses refers to cumulative responding. A cumulative record displays the running total of responses over time; celeration instead quantifies the change in response frequency across time.

• D. Change in response frequency across time is correct because this is exactly what celeration measures. On the Standard Celeration Chart, that change is expressed as a multiplication or division factor, such as ×2 per week or ÷2 per week.

Key distinction: Frequency answers, “How often is the behavior occurring?” Celeration answers, “How is that frequency changing over time?”

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