ABA Data-Driven Decision Making 3 — Questions and Answers
Question 1: A BCBA reviews a graph showing high variability in a client's data during the intervention phase. Which action should be taken FIRST before concluding the intervention is ineffective?
- Immediately switch to a new intervention
- Investigate potential sources of variability (Correct answer)
- Extend the phase by 10 more sessions
- Reduce the behavior reduction criterion
Correct answer: Investigate potential sources of variability
High variability should prompt investigation of environmental, procedural, or measurement factors before drawing conclusions about intervention effectiveness.
Question 2: In applied behavior analysis, what is an 'aim line' on a graph used to represent?
- The average of baseline performance
- The projected path needed to meet the terminal goal by a target date (Correct answer)
- The upper limit of the client's capability
- The trend of the current intervention phase
Correct answer: The projected path needed to meet the terminal goal by a target date
An aim line connects current performance to the terminal criterion at the target date, providing a benchmark against which actual data can be compared.
Question 3: Which level of measurement produces data that can be ordered and has equal intervals but no true zero point?
- Nominal
- Ordinal
- Interval (Correct answer)
- Ratio
Correct answer: Interval
Interval scales have rank order and equal intervals between values, but lack a true zero, unlike ratio scales used for most behavioral counts.
Question 4: A behavior analyst is monitoring a decreasing behavior and the data path shows a decelerating trend. How should this be interpreted?
- The intervention is ineffective and should be stopped
- The behavior is decreasing at a consistent rate, suggesting the intervention is working (Correct answer)
- A maintenance phase should begin immediately
- Baseline data must be re-collected
Correct answer: The behavior is decreasing at a consistent rate, suggesting the intervention is working
A decelerating trend in a target behavior intended for reduction indicates the intervention is producing the desired effect.
Question 5: When a practitioner uses IOA (interobserver agreement) data, what is the primary purpose in data-driven decision making?
- To ensure the intervention is socially valid
- To confirm that the data accurately reflect the behavior being measured (Correct answer)
- To determine the most efficient intervention
- To set the mastery criterion for the program
Correct answer: To confirm that the data accurately reflect the behavior being measured
IOA data verifies measurement accuracy and reliability, which is essential before using data to make intervention decisions.
Question 6: A client's data show a 'counter-therapeutic trend' during the treatment phase for a behavior targeted for increase. What does this mean?
- The behavior is increasing as intended
- The behavior is decreasing in the wrong direction relative to the goal (Correct answer)
- The data are too variable to interpret
- The client has met the mastery criterion early
Correct answer: The behavior is decreasing in the wrong direction relative to the goal
A counter-therapeutic trend means the data are moving in the opposite direction of the treatment goal, indicating the intervention may be ineffective or harmful.
Question 7: Which of the following best describes 'data stability' in the context of analyzing a behavioral phase?
- All data points fall exactly on the trend line
- Data points fall within a consistent range with minimal variability (Correct answer)
- The median and mean of the phase are identical
- The behavior occurs at the same time each session
Correct answer: Data points fall within a consistent range with minimal variability
Stable data are characterized by low variability, with data points clustering within a predictable range, typically within 25-33% of the phase mean.
ABA Data-Driven Decision Making 3
A BCBA reviews a graph showing high variability in a client's data during the intervention phase.
Which action should be taken FIRST before concluding the intervention is ineffective?