Which assessment experimentally manipulates environmental conditions to confirm the function of a behavior?

• A. Functional Analysis
• B. FBA
• C. ABC data collection
• D. Preference assessment

Answer: (A)

The main concept being tested is identifying the function of a behavior by experimentally changing the surrounding environment and watching what happens to the behavior. In a functional analysis, antecedents and consequences are systematically manipulated across different conditions (such as delivering attention, requiring task completion to escape, providing access to tangibles, or a play/alone condition). By comparing how often the behavior occurs in each condition, you can see which consequence reliably increases the behavior, revealing its function (for example, maintained by attention, escape, tangible access, or automatic reinforcement). This approach is different from descriptive or hypothesis-generating methods because it demonstrates a functional relation through controlled manipulation, not just observation. Descriptive methods like ABC data collection describe events but don’t test causality, functional behavior assessments synthesize information from multiple sources without experimental control, and preference assessments identify items likely to reinforce but don’t confirm the behavior’s function.