ABAT - Applied Behavior Analysis Test Applied Behavior Analysis Measurement and Data Collection 1 — Questions and Answers
Question 1: Whole interval recording tends to __________ the occurrence of a behavior compared to its true rate.
- Overestimate, because partial occurrences are still counted
- Underestimate, because the behavior must occur throughout the entire interval to be scored (Correct answer)
- Accurately reflect, because it captures every second of observation
- Overestimate, because observers tend to mark intervals as positive by default
Correct answer: Underestimate, because the behavior must occur throughout the entire interval to be scored
Whole interval recording requires the behavior to be present for the full duration of an interval before it is scored as an occurrence. If the behavior happens for only part of the interval it is not counted, producing a systematic underestimate of how often the behavior actually occurs.
Question 2: A behavior analyst records whether a student is on-task only at the exact moment a timer beeps every 30 seconds. This measurement procedure is called:
- Partial interval recording
- Whole interval recording
- Momentary time sampling (Correct answer)
- Continuous duration recording
Correct answer: Momentary time sampling
Momentary time sampling involves observing and recording whether the behavior is occurring at a precise, pre-set moment rather than throughout an interval. It provides an estimate of behavior occurrence without requiring continuous observation, making it practical for busy practitioners.
Question 3: A student emits 12 self-stimulatory behaviors during a 20-minute recess session and 12 during a 40-minute classroom session. Which dimension of behavior best allows a fair comparison between these two observations?
- Frequency
- Latency
- Inter-response time
- Rate (Correct answer)
Correct answer: Rate
Rate (responses per unit of time, e.g., per minute) standardizes count data across sessions of different lengths. Raw frequency counts are misleading when observation periods differ; dividing the count by session duration yields a comparable measure across sessions.
Question 4: Which data collection method is most appropriate for measuring a behavior that leaves a tangible, lasting product after it occurs?
- Latency recording
- Event recording during the behavior
- Permanent product recording (Correct answer)
- Partial interval recording
Correct answer: Permanent product recording
Permanent product recording measures the physical outcome or byproduct of behavior (e.g., completed worksheets, assembled objects, broken items) rather than the behavior itself. Because the product persists after the behavior ends, direct observation during performance is not required.
Question 5: Why is interval-by-interval IOA (also called scored-interval IOA) considered more rigorous than total-count IOA?
- It can be computed with only one observer present
- It compares agreement on each individual interval, capturing both occurrence and non-occurrence agreement (Correct answer)
- It requires a shorter observation session to yield reliable data
- It automatically corrects for observer drift over time
Correct answer: It compares agreement on each individual interval, capturing both occurrence and non-occurrence agreement
Total-count IOA compares only the overall totals between observers, which can mask disagreements within the session (e.g., one observer records behavior in the first half, the other in the second half, yet totals match). Interval-by-interval IOA checks agreement on every interval independently, making it sensitive to both when behavior was and was not recorded.
Question 6: Inter-response time (IRT) is defined as the elapsed time between:
- The discriminative stimulus and the onset of the first response
- The onset and offset of a single response
- The offset of one response and the onset of the next response (Correct answer)
- The last response and the delivery of reinforcement
Correct answer: The offset of one response and the onset of the next response
IRT measures the duration of the pause between consecutive responses — from when one response ends to when the next begins. It is useful for analyzing response pacing, identifying patterns such as post-reinforcement pauses, and distinguishing it from latency (SD to response onset) or duration (within a single response).
ABAT - Applied Behavior Analysis Test Applied Behavior Analysis Measurement and Data Collection 1
Whole interval recording tends to __________ the occurrence of a behavior compared to its true rate.