# Pain intensity estimation on UNBC-McMaster Shoulder-Pain dataset 25-fold leave-one-subject-out (val)

Source: [Pain intensity estimation on UNBC-McMaster Shoulder-Pain dataset 25-fold leave-one-subject-out (val)](<https://www.sota2.com/research/sota/pain-intensity-estimation-on-unbc-mcmaster-shoulder-pain-dataset-25-fold-leave-one-subject-out-val>)

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

Data updated: 2026-02-26T05:48:54.487Z

Evaluation of Pain intensity estimation performance using the UNBC-McMaster Shoulder-Pain dataset, evaluated via a 25-fold leave-one-subject-out cross-validation scheme, reporting MAE, MSE, and PCC.

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 | Pain intensity estimation |
| Dataset (including any stated split) | UNBC-McMaster Shoulder-Pain dataset 25-fold leave-one-subject-out (val) |
| Metric | MAE |
| Unit | SCALAR |
| Direction | Lower 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

- [MAE](<https://www.sota2.com/research/sota/pain-intensity-estimation-on-unbc-mcmaster-shoulder-pain-dataset-25-fold-leave-one-subject-out-val.md?metric=MAE>): Lower is better; unit: SCALAR.

- [MSE](<https://www.sota2.com/research/sota/pain-intensity-estimation-on-unbc-mcmaster-shoulder-pain-dataset-25-fold-leave-one-subject-out-val.md?metric=MSE>): Lower is better; unit: SCALAR.

- [PCC](<https://www.sota2.com/research/sota/pain-intensity-estimation-on-unbc-mcmaster-shoulder-pain-dataset-25-fold-leave-one-subject-out-val.md?metric=PCC>): Higher is better; unit: SCALAR.

## Recorded results

| Method | MAE | Result date | Report paper |
| --- | --- | --- | --- |
| l1 + l1 center loss | 0.389 | Not recorded | 68fa636a1e209131ce9fe979 |
| smooth l1 | 0.416 | Not recorded | 68fa636a1e209131ce9fe979 |
| smooth l1 + l2 center loss | 0.435 | Not recorded | 68fa636a1e209131ce9fe979 |
| All Zeros (trivial solution) | 0.438 | Not recorded | 68fa636a1e209131ce9fe979 |
| smooth l1 + l1 center loss | 0.456 | Not recorded | 68fa636a1e209131ce9fe979 |
| OSVR-l2 | 0.81 | Not recorded | 68fa636a1e209131ce9fe979 |
| OSVR-l1 | 1.025 | Not recorded | 68fa636a1e209131ce9fe979 |

### l1 + l1 center loss

MAE: 0.389. Result ID: 698bf42bf729bc7f68e6c239.

[Reporting paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

[Implementation](<https://github.com/happynear/PainRegression>)

Recorded evaluation configuration: {"Loss":"l1 + l1 center loss"}. This record does not assert independent reproduction.

### smooth l1

MAE: 0.416. Result ID: 698bf42bf729bc7f68e6c238.

[Reporting paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

[Implementation](<https://github.com/happynear/PainRegression>)

Recorded evaluation configuration: {"Loss":"smooth l1"}. This record does not assert independent reproduction.

### smooth l1 + l2 center loss

MAE: 0.435. Result ID: 698bf42bf729bc7f68e6c23b.

[Reporting paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

[Implementation](<https://github.com/happynear/PainRegression>)

Recorded evaluation configuration: {"Loss":"smooth l1 + l2 center loss"}. This record does not assert independent reproduction.

### All Zeros (trivial solution)

MAE: 0.438. Result ID: 698bf42bf729bc7f68e6c23f.

[Reporting paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

Recorded evaluation configuration: {"Note":"baseline"}. This record does not assert independent reproduction.

### smooth l1 + l1 center loss

MAE: 0.456. Result ID: 698bf42bf729bc7f68e6c23a.

[Reporting paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

[Implementation](<https://github.com/happynear/PainRegression>)

Recorded evaluation configuration: {"Loss":"smooth l1 + l1 center loss"}. This record does not assert independent reproduction.

### OSVR-l2

MAE: 0.81. Result ID: 698bf42bf729bc7f68e6c23d.

[Reporting paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

Recorded evaluation configuration: {"Penalty":"l2"}. This record does not assert independent reproduction.

### OSVR-l1

MAE: 1.025. Result ID: 698bf42bf729bc7f68e6c23c.

[Reporting paper](<https://www.sota2.com/research/paper/68fa636a1e209131ce9fe979.md>)

Recorded evaluation configuration: {"Penalty":"l1"}. This record does not assert independent reproduction.

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