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Results
#1. During an RBT training session, Linda shows a video of a client and instructs three trainees to record the number of times the client goes off-task, which is defined as doing something other than working on the worksheet for more than 10 seconds straight. Trainee 1, Trainee 2, and Trainee 3 all independently record five instances of off-task behavior. However, the client actually went off-task eight times. Given this scenario, which property does the data collected by the trainees most clearly lack?
This question assesses understanding of fundamental data properties in ABA accuracy validity reliability and Interobserver Agreement IOA Accuracy refers to the extent to which observed values match the true values of an event In this scenario the trainees recorded five instances but the client actually went offtask eight times Since the recorded data 5 does not match the actual occurrences 8 the data lacks accuracy Validity refers to the extent to which a measurement actually measures what it purports to measure The trainees were instructed to measure offtask behavior and they did measure offtask behavior even if their count was incorrect Therefore the data is valid because they measured the intended target behavior Reliability refers to the consistency of measurement over time While the three trainees all recorded the same number 5 the text states theres not enough information to definitively say it lacks reliability in a broader sense ie if the same observer took the data multiple times would they get 5 each time However the primary and most immediate deficit based on the comparison to the actual count is accuracy Interobserver Agreement IOA refers to the degree to which two or more independent observers report the same observed values after measuring the same events In this case all three trainees recorded five instances indicating excellent IOA They all agreed even though they were all wrong Therefore the most clear and direct deficit in the data provided is its lack of accuracy as it misrepresented the true number of offtask behaviors
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