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assessment-design-guide
Psychometrics and educational assessment design for researchers
skills/domains/education/assessment-design-guide/SKILL.md
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# Assessment Design Guide
A skill for designing, validating, and analyzing educational assessments using modern psychometric methods. Covers classical test theory, item response theory, test construction, validity evidence, and computerized adaptive testing.
## Classical Test Theory
### Reliability Analysis
Classical test theory (CTT) models observed scores as the sum of a true score and error:
```
X = T + E
```
