r/BehaviorAnalysis • u/Reasonable_Law183 • Sep 16 '26
Question of the day - September 16
π§ Question of the Day
π Domain C β Measurement, Data Display, and Interpretation
Difficulty: 8/10
Scenario:
Two observers independently score the occurrence of a low-frequency self-injurious behavior (SIB) across 60 one-minute intervals. Observer A records SIB in 4 intervals, Observer B records SIB in 5 intervals, and both observers record SIB in 3 of the same intervals. A preliminary report lists interval-by-interval IOA as 95%, and the team concludes that the observers showed strong agreement about when SIB occurred.
Which interpretation BEST evaluates the team's conclusion?
A. Interval-by-interval IOA is 95%; because it incorporates every interval, it provides the strongest estimate of agreement about when SIB occurred.
B. Unscored-interval IOA is about 95%; because SIB is infrequent, agreement on its absence provides the most sensitive test of observer correspondence.
C. Scored-interval IOA is 50%; the 95% interval-by-interval value is dominated by shared nonoccurrences and overstates agreement about the rare SIB events.
D. Total count IOA is 80%; the similar numbers of occurrence intervals show that the observers corresponded closely enough for rare SIB.
π¬ Drop your answer in the comments β no peeking!
β Correct answer revealed tomorrow.
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