What Is Procedural Fidelity In ABA?

It is not uncommon for parents or practitioners to implement a new intervention that appears to be working well, then after a few weeks or months report that the intervention has stopped working. Often, the change in behavior in feels like a mystery and leaves people scrambling for a new intervention. But before searching for a new intervention, you should consider the possibility of problems with procedural fidelity, which “refers to the accuracy with which the intervention or treatment is implemented” (Mayer, Sulzer-Azaroff, & Wallace, 2014).

What Is Procedural Fidelity In ABAProblems with procedural fidelity in ABA are common, and you will experience more success with your interventions if you take steps to address fidelity at the outset. Here are a few suggestions:

  • Post the steps in a visible spot. Clearly list the steps of the procedure and put them in a spot where you will see them often. This might be on the actual data collection sheet or on the wall. One parent I worked with had a Post-it® note with the steps for our intervention attached to her computer screen. Another parent kept the steps inside the ID part of his wallet, where they were protected and visible each time he opened his wallet.
  • Plan meetings to go over the steps. As part of your intervention, set brief monthly or quarterly meetings to go over the steps of the intervention and be sure everyone is maintaining procedural fidelity.
  • Assess for procedural fidelity. Schedule observations to ensure that each step of the intervention is implemented as described. If you do not have someone who can supervise you, take video of yourself implementing the intervention, watch it and compare your actions to the steps outlined in the intervention plan.
  • Outline steps for systematic fading of the intervention. When implementing an intervention, the goal is to have the learner eventually exhibiting the desirable behavior without prompts or planned reinforcement. Sometimes when a parent or practitioner sees the learner’s behavior improving, they begin to remove the prompts or planned reinforcement before the learner is quite ready for it. By writing a plan for fading the intervention into the plan, you make it clear to everyone involved what the requirements are for each step towards mastery.


Mayer, G.R., Sulzer-Azaroff, B., & Wallace, M. (2014). Behavior analysis for lasting change (3rd ed.). Cornwall-on-Hudson, NY: Sloan Publishing.


Sam is an ABA provider for students ages 3–12 in NYC. Working in education for ten years with students with Autism Spectrum Disorders and other developmental delays, Sam has developed strategies for achieving a multitude of academic, behavior, and social goals. Sam is currently pursuing her PhD in Applied Behavior Analysis at Endicott College.