Clinician guide
How to Calculate Interval-by-Interval IOA
Divide occurrence or nonoccurrence interval agreements by matched intervals, report prevalence, and recognize when many empty intervals make agreement look strong.
Clinician Resources
Clinical guides, tools, and evidence-informed resources for thoughtful, high-quality ABA care.
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Clinician guide
How to Calculate Trial-by-Trial IOA
Match the same eligible trials, divide agreements by trials compared, and keep invalid, missing, prompted, or differently defined ABA trials visible.
Clinician guide
How to Calculate Exact Count-per-Interval IOA
Divide intervals with identical observer counts by intervals compared, preserve interval records, and interpret the method's sensitivity to any count difference.
Clinician guide
How to Calculate Mean Count-per-Interval IOA
Calculate smaller divided by larger count in each matched interval, average interval agreements, preserve raw counts, and define how zero-zero intervals are handled.
Clinician guide
How to Calculate Total Count IOA in ABA
Calculate smaller total count divided by larger total count, verify matched exposure, preserve observer counts, and recognize temporal disagreement hidden by totals.
Clinician guide
How to Reconcile ABA Data From Different Measurement Systems
Document definitions, units, exposure, conversion assumptions, overlap, calibration, and discontinuities when ABA data move between measurement systems.
Clinician guide
How to Display Missing and Invalid Data on ABA Graphs
Encode missing, invalid, late, corrected, not-due, zero-opportunity, and true-zero ABA data without connecting unknown periods or converting gaps to zero.
Clinician guide
How to Compare ABA Data When Opportunity Density Changes
Measure eligible opportunities per time, separate response performance from opportunity availability, and interpret ABA count changes with environment data.
Clinician guide
How to Aggregate ABA Data Across Sessions Without Weighting Errors
Distinguish a mean of session percentages from a pooled opportunity percentage, weight by the correct exposure, and keep incompatible ABA conditions separate.
Clinician guide
How to Summarize Skewed Duration Data in ABA
Inspect raw durations, median, mean, range, percentiles, exposure, open-ended events, and context when a few long observations skew ABA data.
Clinician guide
How to Record ABA Latency When the Response Does Not Occur
Define a response window, preserve no-response trials apart from observed latency, and summarize ABA timing data without treating the window maximum as a response.
Clinician guide
How to Compare Rate per Time With Rate per Opportunity
Calculate event rate per time and response rate per eligible opportunity, interpret opportunity density, and choose the unit that matches the clinical question.
