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How Well is Your Intervention Working?

Once you have fully developed your plan, the next step is implementation!

Monitoring an intervention involves the consideration of two guiding questions (NJ PBSIS, 2015): 

  1. To what extent are the interventions and strategies being implemented as designed (i.e., implementation fidelity)?

  2. To what extent are the interventions and strategies resulting in positive changes in behavior (i.e., student-specific outcomes)?


In order to answer these questions, you will need to:

  • Compare a student’s baseline data to the intervention data to determine improvements

  • Review implementation fidelity to determine how well the plan was implemented

  • Monitor the social validity of the intervention

  • Decide if you need to continue monitoring, modify or discontinue the intervention


Step 1: Gather the behavior and fidelity data that you've been collecting (if your data are not already graphed, do this either on paper or electronically)

Step 2: Examine your graph. Decide if your data indicate a positive, questionable, or poor response to the intervention (MO SW-PBS):

Here are examples of each (Source: MO SW_PBS Tier 2 Workbook):























Step 3: Using the MO SW-PBS Decision Chart above, determine how you will proceed (i.e., continue monitoring, modify the intervention, or discontinue the intervention). Here are some general questions you can ask when reviewing intervention data:

If data indicate student improvements:

  • Have the improvements occurred for a steady amount of time (e.g., more than a week)?

  • Has the student met his/her goal?

    • If so, plan how you will help generalize the student’s skills across settings. Find strategies here.

    • How will you monitor the student to make sure the positive effects are maintained?

  • Is it appropriate to begin fading your intervention (i.e., gradually decrease supports)?

    • If so, plan how you will do this (learn more here).

  • Is there another behavior that needs to be addressed? Can the intervention be easily modified to address this need? If not, is it appropriate to terminate the current intervention and develop a new one?

If you are not seeing improvements:

  • What are some reasons this might be occurring?

    • Is fidelity a concern (i.e., is fidelity low)?

      • If the intervention has been implemented with low fidelity, ask:

        • Are additional resources (e.g.. staff, materials) needed to fully implement the plan?

        • Is additional training needed to support the implementer(s)?

        • Is the feasibility of the plan an issue?

  • What changes are needed? How can these be made?

    • If changes need to occur, address these and continue the intervention while monitoring fidelity.

For more information about intervention implementation and monitoring, take a look visit the IRIS Center.

**Whether a student is not making progress or has met their goal, it is crucial that you continue to implement the intervention until a team decision is made about how to proceed.

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