# Item Difficulty Rank-Order Correlation on VLAT 53 items

Source: [Item Difficulty Rank-Order Correlation on VLAT 53 items](<https://www.sota2.com/research/sota/item-difficulty-rank-order-correlation-on-vlat-53-items>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2026-06-11T07:05:05.908Z

Evaluation of model performance using rank-order correlation (Spearman's rho) on the VLAT 53 items dataset.

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

| Scope | Recorded value |
| --- | --- |
| Task | Item Difficulty Rank-Order Correlation |
| Dataset (including any stated split) | VLAT 53 items |
| Metric | Spearman's Rho |
| Unit | SCALAR |
| Direction | Higher is better |
| Results loaded | 8 of 8 |
| Coverage | All results currently returned for this benchmark |

Evaluation settings may differ between results. The original papers and recorded configurations are needed to establish comparability. A shared metric name alone does not establish an identical protocol.

## Metrics

- [Spearman's Rho](<https://www.sota2.com/research/sota/item-difficulty-rank-order-correlation-on-vlat-53-items.md?metric=Spearman%27s%20Rho>): Higher is better; unit: SCALAR.

## Recorded results

| Method | Spearman's Rho | Result date | Report paper |
| --- | --- | --- | --- |
| Claude 4.6 | 0.44 | Not recorded | 6a28f34b90966ade919c17d0 |
| Claude 4.6 | 0.31 | Not recorded | 6a28f34b90966ade919c17d0 |
| Claude 4.6 | 0.24 | Not recorded | 6a28f34b90966ade919c17d0 |
| Claude 4.6 | 0.23 | Not recorded | 6a28f34b90966ade919c17d0 |
| Claude 4.6 | -0.09 | Not recorded | 6a28f34b90966ade919c17d0 |
| Claude 4.6 | -0.09 | Not recorded | 6a28f34b90966ade919c17d0 |
| Claude 4.6 | -0.19 | Not recorded | 6a28f34b90966ade919c17d0 |
| Claude 4.6 | -0.23 | Not recorded | 6a28f34b90966ade919c17d0 |

### Claude 4.6

Spearman's Rho: 0.44. Result ID: 6a2a5e16fbc373592c26f1a2.

[Reporting paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

Recorded evaluation configuration: {"Mode":"Image","Persona Stratum":"Baseline"}. This record does not assert independent reproduction.

### Claude 4.6

Spearman's Rho: 0.31. Result ID: 6a2a5e16fbc373592c26f19f.

[Reporting paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

Recorded evaluation configuration: {"Mode":"Image","Persona Stratum":"Llow"}. This record does not assert independent reproduction.

### Claude 4.6

Spearman's Rho: 0.24. Result ID: 6a2a5e16fbc373592c26f1a0.

[Reporting paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

Recorded evaluation configuration: {"Mode":"Image","Persona Stratum":"Lmed"}. This record does not assert independent reproduction.

### Claude 4.6

Spearman's Rho: 0.23. Result ID: 6a2a5e16fbc373592c26f1a1.

[Reporting paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

Recorded evaluation configuration: {"Mode":"Image","Persona Stratum":"Lhigh"}. This record does not assert independent reproduction.

### Claude 4.6

Spearman's Rho: -0.09. Result ID: 6a2a5e16fbc373592c26f1a4.

[Reporting paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

Recorded evaluation configuration: {"Mode":"Text","Persona Stratum":"Lmed"}. This record does not assert independent reproduction.

### Claude 4.6

Spearman's Rho: -0.09. Result ID: 6a2a5e16fbc373592c26f1a5.

[Reporting paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

Recorded evaluation configuration: {"Mode":"Text","Persona Stratum":"Lhigh"}. This record does not assert independent reproduction.

### Claude 4.6

Spearman's Rho: -0.19. Result ID: 6a2a5e16fbc373592c26f1a3.

[Reporting paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

Recorded evaluation configuration: {"Mode":"Text","Persona Stratum":"Llow"}. This record does not assert independent reproduction.

### Claude 4.6

Spearman's Rho: -0.23. Result ID: 6a2a5e16fbc373592c26f1a6.

[Reporting paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

[Method origin paper](<https://www.sota2.com/research/paper/6a28f34b90966ade919c17d0.md>)

Recorded evaluation configuration: {"Mode":"Text","Persona Stratum":"Baseline"}. This record does not assert independent reproduction.

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