Upload a CSV of student responses or load sample data to begin.
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CSV format: first column = Student ID, remaining columns = item responses (1 = correct, 0 = wrong).
Optionally include rows labeled b, a, c for embedded item parameters. Omitted answers: leave blank or use NA, ., or -. Omitted items are not counted as wrong.
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Click to upload or drag & drop CSV
Dichotomous (0/1) responses · Student ID in first column
📋 Data Preview
⚙️ Analysis Settings
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Floored: Students who answer all items incorrectly (or leave all blank) receive the scale minimum as their score. This is the standard behaviour for bounded score scales.
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Item Parameters
Estimated IRT parameters for each test item.
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Import response data and run analysis to view item parameters.
📈 Item Difficulty Distribution
📋 Item Parameter Table
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θ
Theta (θ) Estimation
Latent ability estimates per student with standard errors.
θ
Complete the analysis to view theta estimates.
📈 Theta Distribution
🔵 Score vs Theta
🎓 Student Results
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🎯
Score Conversion
Theta-to-score linear transformation and distribution.
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Complete the analysis to view score conversions.
📐 Theta → Score Formula
🔢 Manual Converter
500
UTBK Score
📊 Score Distribution
📋 Percentile Table
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Item Score Details
Item-level IRT scores and response breakdown per student.