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Results
#1. An RBT collects meticulous data showing that a newly implemented intervention was highly effective at significantly reducing a client’s problematic behavior. However, on the way to the scheduled supervision meeting, the RBT accidentally forgets to bring their physical data sheet. Due to the absence of this crucial empirical evidence, the supervising BCBA reviews the RBT’s brief verbal summary and, lacking the detailed visual analysis provided by the data, incorrectly concludes that the intervention was not effective at changing the behavior. This mistaken conclusion leads the BCBA to consider unnecessary changes to an already successful plan. In this specific scenario, what type of error did the BCBA commit by making an inaccurate determination about the intervention’s efficacy?
The BCBA committed a Type 2 error also known as a False Negative A Type 2 error occurs when a researcher or practitioner fails to detect a real effect or concludes that an intervention was not effective when in reality it was effective In this scenario the intervention was effective as the RBTs data showed but the BCBA incorrectly determined it was not effective due to the missing data This is precisely the definition of a Type 2 error where a true positive outcome is missed or rejected Lets look at why other options are incorrect Type 1 error False Positive A Type 1 error occurs when a researcher or practitioner incorrectly concludes that an intervention was effective when in reality it was not effective This is the opposite of what happened here If the intervention had been ineffective but the BCBA concluded it was effective that would be a Type 1 error IOA error An IOA Interobserver Agreement error refers to discrepancies in data when two or more independent observers measure the same behavior simultaneously and their data do not match within an acceptable range While important for data integrity the BCBAs error here is one of interpretation based on insufficient information not a disagreement between observers Error in visual analysis Visual analysis involves carefully inspecting graphed data to make judgments about the presence and significance of behavior change The text explicitly states that the BCBA is missing that data implying they did not have the opportunity to perform visual analysis Therefore they cannot be said to have made an error in visual analysis if they couldnt even conduct it properly
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