---
name: item-analysis-tool
description: Performs statistical analysis on assessment items including difficulty, discrimination, and distractor effectiveness.
---

# item-analysis-tool

## Capabilities

- Calculate item difficulty indices
- Calculate point-biserial discrimination
- Analyze distractor performance
- Flag problematic items

## Usage

Use this skill when:
- Analyzing pilot test data
- Reviewing item performance after administration
- Improving assessment quality

## Input

Item response data (learner responses with correct/incorrect indicators).

## Output

Item analysis report with:
- Difficulty index (p-value) for each item
- Discrimination index for each item
- Distractor analysis
- Items flagged for review

## Limitations

- Requires response data from actual administration
- Statistical validity depends on sample size
- Does not assess content validity

## Assumptions

- Response data is complete and accurate
- Minimum sample size of 30 for reliable statistics