What does "intervention fidelity" refer to in Applied Behavior Analysis (ABA)?

Intervention fidelity in Applied Behavior Analysis (ABA) refers specifically to the degree to which the implemented intervention aligns with the original design or plan. This concept is vital because it ensures that the intervention is delivered as intended, capturing all the essential components that were validated through research. When fidelity is high, it means that the strategies employed are being implemented consistently and accurately, which boosts the reliability of the data collected and the overall effectiveness of the intervention. Assessing and maintaining intervention fidelity is crucial for evaluating outcomes and determining whether the intervention is achieving its intended effects. If the intervention deviates from its planned implementation, it can introduce variables that compromise the validity of the results. Thus, maintaining fidelity is integral to the integrity and success of behavioral interventions in ABA.