Parsimony

In Applied Behavior Analysis (ABA), the concept of parsimony refers to explaining a behavior using the simplest and most straightforward approach before considering more complex explanations. This principle encourages behavior analysts to first rule out basic environmental or learning-based factors.

Example: If a child is not completing homework, a parsimonious explanation might be that the assignments are too difficult or lack sufficient reinforcement, rather than assuming an underlying psychological issue. Starting with the simplest explanation ensures that interventions remain efficient, effective, and evidence-based.