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Results

#1. A Board Certified Behavior Analyst (BCBA) conducts routine supervision and notices a concerning trend during and immediately following their presence, the client’s maladaptive behaviors increase, and appropriate break time behaviors decrease. The technician reports no changes in their behavior-change procedures or data collection methods when the BCBA is not present. Given this information, what is the most likely and best explanation for these observed changes in the client’s behavior and associated data trends?

Observer drift

Treatment drift

Reactivity

Random chance

Reactivity refers to the phenomenon where the presence of an observer or the awareness of being observed influences the behavior of the individual being observed In this scenario the clients behavior changes specifically when the BCBA is present indicating that the client is reacting to the BCBAs presence This directly impacts the accuracy and representativeness of the data collected during these times as the behavior may not reflect typical performance Observer drift A involves changes in the observers application of the measurement system leading to inaccurate data but the prompt states the technician reports no changes in their methods Treatment drift B occurs when the intervention is not implemented as designed treatment integrity decreases which is also ruled out by the technicians report of consistent implementation Random chance D is an unlikely explanation for a consistent observable trend linked directly to the BCBAs presence

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