Time Series Analysis
Track changes in question difficulty and discrimination from 2016 to 2025
Average Facility by Year
Are SATs papers getting harder or easier?
Average Discrimination by Year
How well do questions differentiate ability?
Strand Performance Over Time
Top 5 strands by frequency
Key Insights
Automatically detected patterns in the data
â 66.3%
Year-on-Year Change
2024 â 2025 facility
â 100.0%
Overall Trend
Since 2016
0.00
Latest Discrimination
Average for 2025
| Year | Questions | Avg Facility | Avg Discrimination | Trend |
|---|---|---|---|---|
| 2016 | 88 | 67.8% | 0.473 | |
| 2017 | 87 | 68.7% | 0.499 | â 0.9% |
| 2018 | 85 | 70.9% | 0.497 | â 2.1% |
| 2019 | 89 | 71.5% | 0.509 | â 0.6% |
| 2022 | 87 | 68.1% | 0.559 | â 3.3% |
| 2023 | 91 | 68.4% | 0.521 | â 0.2% |
| 2024 | 89 | 66.3% | 0.537 | â 2.0% |
| 2025 | 89 | 0.0% | 0.000 | â 66.3% |