BCBA Exam Formulas

BCBA Exam Formulas Total Count IOA - Smaller #/Larger # x 100% Mean Count-Per-Interval IOA - Int 1 IOA + Int 2 IOA + Int N IOA/Total # of Intervals x 100% Exact Count-Per-Interval IOA - # of Intervals of 100% agreement/total # of Intervals x 100% Trial-by-Trail IOA - # of Trials of Agreement/Total # of Trials x 100% Total Duration IOA - Shorter Duration/Longer Duration x 100% Mean Duration (or IRT)-Per-Occurrence IOA - Duration IOA B1 + Duration IOA B2 + Duration IOA Bn/n Behaviors with Duration IOA Interval-By-Interval IOA - # of Intervals Both Recorders Agree/Total # of Intervals x 100% Scored Interval IOA - # of Intervals Both Recorders Recorded Occurrence/# of Intervals AT LEAST ONE Recorder Recorded Occurrence x 100% Unscored Interval IOA - # of Intervals Both Recorders Recorded Non-Occurrence/# of Intervals AT LEAST ONE Recorder Recorded Non-Occurrence x 100% For Increasing Behaviors - Baseline Average < Initial Criterion </= Highest Performance in Baseline For Decreasing Behaviors - Baseline Average > Initial Criterion >/= Lowest Performance in Baseline Setting Initial NCR Schedule - Total Duration of All Baseline Sessions/Total # of Behaviors Recorded During Baseline Sessions Setting Initial DRO Interval - Total Duration of All Baseline Sessions/Total # of Behaviors Recorded During Baseline Sessions Full Session DRL - Total # of Behaviors Recorded During Baseline Sessions/Total # of Each Baseline Session Interval & Spaced Responding DRL - Total Duration of Baseline Sessions/Baseline Average of Behaviors per Baseline Sessions = # of Behaviors per duration Conditional Probabilities - # of Behaviors Preceded by a Specific Antecedent &/or Followed by a Specific Consequence/Total # of Behaviors - always reported in decimal form