I’ve heard people use the term functional behavior assessment but I’ve also heard the term functional analysis. What’s the difference between the two?

A functional analysis is a controlled comparison of two or more variables that may be influencing the emission of problem behavior (For example, comparing when attention is delivered right after property destruction vs. no attention being delivered). In a functional analysis, this comparison would be replicated to demonstrate a causal relationship between the consequence and the problem behavior. A functional behavior assessment may or may not include a functional analysis. Typically a record review, interview assessment, a scatterplot, and an ABC analysis may be staples of a functional behavior assessment.