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#1. Brent is an RBT collecting data on a student’s ‘on-task behavior’ during independent reading time. The BCBA’s primary objective is to significantly increase the consistency and duration of the student’s on-task behavior throughout the entire reading interval. Given this goal, and considering only discontinuous measurement procedures, which method should Brent use to most accurately reflect progress toward increasing the desired behavior?
When the goal is to increase a behavior that should be sustained or occur for a significant portion of an interval such as ontask behavior the choice of discontinuous measurement is crucial The text emphasizes identifying the questions goal and understanding the pros and cons of each method Lets break down the options Whole Interval Recording WIR This method requires the target behavior to occur throughout the entire interval for it to be recorded as an occurrence If the behavior stops even for a moment during the interval it is not counted Because of this stringent criterion WIR tends to underestimate the actual occurrence of behavior However this characteristic makes it the most appropriate choice for increasing behaviors that need to be sustained If a behavior increases when measured by WIR it means the learner is performing the behavior for longer more consistent periods directly reflecting the goal of increasing consistency and duration Partial Interval Recording PIR This method records an occurrence if the behavior happens at any point during the interval no matter how brief PIR tends to overestimate the occurrence of behavior If a student is ontask for only 1 second out of a 1minute interval it would still count as an ontask interval This makes it a poor choice for increasing sustained ontask behavior as it could show an increase even if the student is only briefly ontask Momentary Time Sampling MTS This method records whether the behavior is occurring at the very end of a specified interval MTS can either overestimate or underestimate behavior depending on its pattern It provides a snapshot but can miss much of the behavior that occurs during the interval It is generally not the most sensitive method for promoting a sustained increase in a behavior like ontask Duration Recording While Duration Recording Option 4 would be the most precise and direct measure for increasing the duration of ontask behavior the question explicitly asks for a discontinuous measurement procedure Duration recording is a continuous measurement method which is why it is not the correct answer in this specific context
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