Final answer:
The least relevant factor to consider in an FBA for gathering information is the individual's intelligence quotient (IQ), as it does not typically relate directly to the function of a behavior.
Step-by-step explanation:
When conducting a Functional Behavior Assessment (FBA), the least relevant factor to consider when gathering specific information is the individual's intelligence quotient (IQ). An FBA focuses on understanding the functions of a behavior, which are the reasons behind why a behavior is occurring. Specifically, it seeks to identify the antecedents (what happens before a behavior), the behavior itself, and the consequences (what happens after the behavior) in a specific context. These aspects are critical in developing interventions to change the behavior. The individual's IQ is generally not directly related to the function of a behavior and therefore would not typically need to be a priority in an FBA