BCBA
Chelsea, for today's session I need you to collect frequency data on Sam's hand-raising behavior. Here is the data sheet. A hand raise is defined as Sam lifting his hand above shoulder level and waiting to be called on.
RBT
Before we start, I'll review the operational definition and ensure I have my data sheet, clipboard, and pencil ready.
BCBA
Excellent. What data collection method will you use?
RBT
I will use frequency recording because we're counting how many times the behavior occurs.
BCBA
Measurement A-2: Implement Continuous Measurement Procedures
RBT
Sam raises hand two more times.
BCBA
How many occurrences have you recorded?
RBT
I recorded three instances of hand raising.
BCBA
Now we will measure how long Sam remains engaged in independent work.
BCBA
Timer starts when Sam begins work.
BCBA
Sam works continuously for 8 minutes.
RBT
I started timing when the behavior began and stopped timing when it ended. The duration was 8 minutes.
BCBA
Sam, touch your head.
BCBA
Instruction given at 10:00:00
BCBA
Sam touches head at 10:00:05
RBT
The latency was 5 seconds because 5 seconds passed between the instruction and the response.
BCBA
Interresponse Time (IRT)
BCBA
We are measuring the time between requests for attention.
RBT
The interresponse time between requests was 2 minutes.
RBT
Measurement A-3: Implement Discontinuous Measurement Procedures
BCBA
Partial Interval Recording
BCBA
We will use 30-second intervals to measure humming.
RBT
I mark the interval as occurring because the behavior happened at least once during the interval.
BCBA
Whole Interval Recording
BCBA
We are measuring remaining seated.
RBT
I mark the interval because the behavior occurred for the whole interval.
BCBA
Momentary Time Sampling
BCBA
At the end of each minute, observe whether Sam is on task.
BCBA
Timer reaches 1 minute. Sam is on task.
RBT
I record 'yes' because the behavior was occurring at the exact moment I checked.
Measurement A-4: Enter Data an
BCBA: You collected frequency data for five days:
RBT
I enter the data into the graph, place a dot for each day's frequency, and connect the points to show the trend.
BCBA
What trend do you see?
RBT
The hand-raising behavior appears to be increasing across the week.
BCBA
Competency Check Questions
BCBA
When would you use frequency recording?
RBT
When a behavior has a clear beginning and end and can be counted accurately.
BCBA
When would you use duration recording?
RBT
When the length of time a behavior occurs is important.
RBT
The time between a direction or stimulus and the beginning of the response.
BCBA
What the Assessor Is Looking For
BCBA
✅ Correct identification of measurement systems
BCBA
✅ Accurate data collection
BCBA
✅ Proper use of timers and data sheets
BCBA
✅ Accurate calculations
BCBA
✅ Ability to explain why a measurement procedure was selected
BCBA
✅ Professional behavior while collecting data
BCBA
This script closely mirrors the style of interaction commonly seen during an RBT Initial Competency Assessment for the Measurement domain and can be used for practice with trainees.
