A forced choice preference assessment is a systematic method used in applied behavior analysis to identify potential reinforcers by presenting two items simultaneously and recording which one a client selects. This direct assessment approach helps practitioners develop a hierarchy of preferences that can inform effective intervention planning. Understanding this procedure is essential for both clinical practice and BCBA exam preparation.
Table of Contents
- What is a Forced Choice Preference Assessment?
- Conducting the Assessment: A Step-by-Step Procedure
- Applied Examples for the BCBA Exam
- Exam Relevance and Common Traps
- Quick Checklist and Summary
- References
What is a Forced Choice Preference Assessment?
This assessment method involves presenting two items at the same time and requiring the client to choose one. The procedure systematically pairs all items against each other to determine relative preferences.
Key Definition and Purpose
A forced choice preference assessment is a direct, systematic evaluation where a client selects between two simultaneously presented stimuli. The primary purpose is to establish a hierarchy of potential reinforcers by calculating selection percentages across multiple trials. This method provides objective data about relative preferences rather than absolute preferences.
When and Why BCBAs Use This Method
Behavior analysts select this approach when clients can make clear choices between items. It’s particularly useful when you need quick preference data or when free operant observation yields unclear results. The method aligns with ethical practice principles by incorporating client choice and autonomy into assessment procedures.
- Ideal for choice-capable clients who can indicate preferences
- Provides systematic comparison data across multiple items
- Offers objective selection percentages for ranking preferences
- Supports person-centered planning by involving client preferences
Conducting the Assessment: A Step-by-Step Procedure
Following a standardized procedure ensures reliable results that can inform intervention decisions. This systematic approach minimizes bias and maximizes clinical utility.
Step 1: Item Selection and Preparation
Begin by identifying a pool of potential reinforcers through indirect assessment methods like caregiver interviews or preference surveys. Select 5-8 items that represent diverse categories of potential reinforcement. Prepare the environment by minimizing distractions and ensuring items are equally accessible.
Step 2: The Presentation and Data Collection Process
Present items equidistant from the client using a neutral prompt like “pick one.” Record the selection immediately after the choice is made. Systematically pair each item with every other item in the pool, typically using a paired-stimulus format. Calculate selection percentages by dividing selections by total presentations.
Step 3: Interpreting Your Results
Rank items from highest to lowest selection percentage. Items selected 80-100% of the time are considered high-preference, while those selected less frequently represent lower preferences. Remember that assessment results only identify potential reinforcers that must be validated through reinforcement testing.
- Calculate selection percentages for each item
- Create a preference hierarchy based on percentages
- Identify high-preference items (80-100% selection)
- Plan reinforcement tests to validate assessment results
Applied Examples for the BCBA Exam
Practical examples demonstrate how forced choice preference assessments translate into clinical decision-making and intervention planning.
Example 1: Identifying Tangible Reinforcers
Consider a 6-year-old client with three potential reinforcers: bubbles, tablet, and ball. After systematic pairing, the tablet is selected 90% of the time, bubbles 60%, and the ball 30%. This creates a clear preference hierarchy where the tablet represents the highest preference stimulus.
In a DRA procedure to teach manding, the therapist could use the tablet as a reinforcer for appropriate requests. An ABC data example might show: Antecedent – client sees tablet on shelf, Behavior – client says “tablet please,” Consequence – therapist provides 2 minutes of tablet time. This demonstrates the direct link between assessment results and effective intervention implementation.
Example 2: Assessing Social Reinforcers
For a teenager, choices might include high-five, verbal praise, and quiet conversation. Results could reveal a preference for quiet praise (selected 85% of the time) over exuberant social interactions. This information helps hypothesize that the function of certain behaviors might be attention-seeking but specifically for low-intensity social reinforcement.
This assessment data informs a behavior reduction plan by identifying which types of attention to provide contingently versus which to minimize. It also guides the development of alternative communication strategies that match the client’s preferred reinforcement style.
Exam Relevance and Common Traps
Understanding how forced choice preference assessments appear on the BCBA exam helps candidates avoid common mistakes and demonstrate clinical competence.
Frequently Tested Concepts and Question Formats
- Recognizing it as a direct assessment method (vs. indirect)
- Calculating selection percentages from trial data
- Distinguishing from MSWO (multiple stimulus without replacement)
- Identifying its role in the assessment phase of practice
- Understanding it measures relative preference, not duration
Mistakes to Avoid on Test Day
Several common errors can lead to incorrect answers on exam questions about preference assessments.
- Confusing forced choice with compliance demands or forced exposure
- Assuming assessment results alone confirm reinforcement effectiveness
- Misidentifying the measurement as duration of engagement rather than selection
- Overlooking the need for reinforcement testing after assessment
- Failing to recognize that it’s a paired-stimulus procedure
Quick Checklist and Summary
Use this checklist to ensure proper implementation and exam readiness for forced choice preference assessments.
- Select 5-8 items via indirect assessment methods
- Present items simultaneously and equidistantly
- Use neutral prompts without bias
- Record immediate selections after each presentation
- Pair each item systematically with all others
- Calculate selection percentages for ranking
- Create a preference hierarchy from results
- Validate with reinforcement testing before implementation
- Document assessment procedures and results clearly
Forced choice preference assessments provide valuable data for developing effective reinforcement systems in ABA practice. By systematically comparing items and calculating selection percentages, practitioners can identify potential reinforcers that align with client preferences. Remember that assessment results must be followed by reinforcement testing to confirm effectiveness. For more information on assessment methods, see our guide on preference assessments and assessment in ABA. Additional resources on reinforcement procedures can be found in the reinforcement guide.
