RBT RBT Measurement and Data Collection 4 — Questions and Answers
Question 1: A client engages in self-injurious behavior (SIB) that occurs in rapid bursts making it impossible to count each instance individually. Which measurement system is MOST appropriate?
- Frequency recording
- Partial interval recording (Correct answer)
- Whole interval recording
- Momentary time sampling
Correct answer: Partial interval recording
Partial interval recording is best for behaviors occurring in rapid bursts that are difficult to count individually, as it captures whether the behavior occurred at any point during each interval.
Question 2: During a 30-minute session, a client's appropriate play behavior was observed during 18 of 30 intervals using whole interval recording. What is the percentage of intervals?
- 18%
- 30%
- 60% (Correct answer)
- 90%
Correct answer: 60%
Percentage = (intervals with behavior / total intervals) × 100 = (18/30) × 100 = 60%.
Question 3: An RBT is using momentary time sampling with 1-minute intervals over a 10-minute observation. The client is on-task at the moment of observation in 6 of 10 intervals. What does this tell us?
- The client was on-task for exactly 60% of the session
- The client was on-task at 60% of the sampled time points (Correct answer)
- The client completed 6 tasks during the session
- The client had 6 correct responses
Correct answer: The client was on-task at 60% of the sampled time points
Momentary time sampling only reflects what is happening at the exact moment of observation, not the total duration of the behavior.
Question 4: Which data collection method would BEST capture the number of words spoken by a client during a language intervention session?
- Duration recording
- Frequency recording (Correct answer)
- Latency recording
- Whole interval recording
Correct answer: Frequency recording
Frequency recording counts the number of discrete occurrences, making it ideal for tallying individual words spoken.
Question 5: An RBT records the time from when an instruction is given to when the client begins the response. This is called:
- Inter-response time
- Duration recording
- Latency recording (Correct answer)
- Response time sampling
Correct answer: Latency recording
Latency recording measures the time elapsed between the presentation of a stimulus (instruction) and the initiation of the response.
Question 6: A supervisor reviews an RBT's data sheet and notices behavior was marked as occurring during every interval of a session. The supervisor suspects the RBT may have engaged in:
- Drift (Correct answer)
- Observer reactivity
- Systematic data collection
- Interobserver agreement
Correct answer: Drift
Drift occurs when an observer's recording gradually deviates from the original operational definition, often resulting in inaccurate data over time.
Question 7: Which of the following BEST describes a continuous measurement system?
- Behavior is sampled at specific points in time
- Every occurrence of the behavior is recorded throughout the observation period (Correct answer)
- Behavior is recorded only during pre-selected intervals
- A behavior is recorded if it occurs at any point during a timed interval
Correct answer: Every occurrence of the behavior is recorded throughout the observation period
Continuous measurement means every single instance of the target behavior is recorded throughout the entire observation period without sampling.
RBT RBT Measurement and Data Collection 4
A client engages in self-injurious behavior (SIB) that occurs in rapid bursts making it impossible to count each instance individually.
Which measurement system is MOST appropriate?