README.md

---
pretty_name: 100 FAST Synths
annotations_creators:
  - machine-generated
tags:
  - synthetic-data
  - virtual-reality
  - xr
  - motion-tracking
  - time-series
  - tabular
  - user-identification
  - biometrics
  - pandas
---

# 100 FAST Synths

## Dataset Description

**100 FAST Synths** is a synthetic extended reality (XR) motion dataset intended for machine-learning research on motion-based user identification. It represents a synthetic behavioral population of 100 motion profiles derived from participant pairs in the Full-scale Assembly Simulation Testbed (FAST) Dataset.

The dataset follows the two assembly conditions in FAST:

- `FAB_A`: motion during assembly condition/build A
- `FAB_B`: motion during assembly condition/build B

Every synthetic behavioral profile has one CSV file in `FAB_A` and one corresponding CSV file in `FAB_B`, for a total of 200 motion files. This supports experiments such as training on one assembly condition and evaluating identification on the other.

The associated paper, **"Generating Synthetic Behavioral Populations from XR Motion"** by Xiaozheng Wang and Ryan P. McMahan, has been accepted for publication at the 2026 Future of HCI Workshop (FutureHCI '26).

## Dataset Contents

```text
.
|-- pair_to_sy_map.csv
`-- Syn_Inspector180/
    |-- FAB_A/
    |   |-- Female/   # 46 files
    |   `-- Male/     # 54 files
    `-- FAB_B/
        |-- Female/   # 46 files
        `-- Male/     # 54 files
```

Summary:

| Item | Count |
|---|---:|
| Synthetic behavioral profiles | 100 |
| Motion files per profile | 2 |
| Motion CSV files | 200 |
| `FAB_A` files | 100 |
| `FAB_B` files | 100 |
| Female synthetic IDs | 46 |
| Male synthetic IDs | 54 |

Motion filenames follow the pattern:

```text
Sy<synthetic-id>_<BuildA-or-BuildB>.csv
```

For example, the files `Sy008369F_BuildA.csv` and `Sy008369F_BuildB.csv` contain the two build conditions for the same synthetic behavioral profile.

## Motion File Schema

Each motion CSV contains 49 columns. Every row is a time sample with tracking data for the head, left hand, and right hand.

| Field group | Columns | Description |
|---|---|---|
| Time | `Timestamp` | Sample timestamp |
| Position | `<Tracker>_position_{x,y,z}` | 3D position |
| Quaternion | `<Tracker>_quat_{x,y,z,w}` | Quaternion orientation |
| 6D rotation | `<Tracker>_sixD_{a,b,c,d,e,f}` | Six-dimensional rotation representation |
| Euler angles | `<Tracker>_euler_{x,y,z}` | Euler orientation in degrees, in the range [-180, 180] |

`<Tracker>` is one of `Head`, `LeftHand`, or `RightHand`.

### Important column-order note

The files use two column-order variants. In 66 files, the `RightHand` position/quaternion/6D fields precede the corresponding `LeftHand` fields; in 134 files, the left-hand fields precede the right-hand fields. Field names are consistent across both variants. Load columns by name rather than by numeric position.

The coordinate system, position units, timestamp units, Euler convention/order, and precise 6D rotation convention should be confirmed from the associated data-generation documentation before geometric reconstruction.

## Synthetic Behavioral Mapping

`pair_to_sy_map.csv` contains 100 rows and three columns:

| Column | Description |
|---|---|
| `personA_id` | First FAST participant contributing to the synthetic behavioral profile |
| `personB_id` | Second FAST participant contributing to the synthetic behavioral profile |
| `sy_id` | Resulting synthetic behavioral identifier used in motion filenames |

Each `sy_id` maps to exactly one pair of source participant IDs.

## Loading the Data

The CSV files can be loaded directly with pandas:

```python
from pathlib import Path
import pandas as pd

root = Path("Syn_Inspector180")
motion_files = sorted(root.glob("FAB_*/*/*.csv"))

df = pd.read_csv(motion_files[0])

# Select by name so both column-order variants are handled correctly.
head_position = df[[
    "Head_position_x",
    "Head_position_y",
    "Head_position_z",
]]

mapping = pd.read_csv("pair_to_sy_map.csv")
```

## Intended Uses

The dataset is intended for research on:

- XR motion-based user identification and recognition
- Cross-condition identification between `FAB_A` and `FAB_B`
- Evaluation of motion representations, including position, quaternion, 6D rotation, and Euler angles
- Synthetic-data methods for XR motion research
- Robustness and generalization studies for motion-based machine-learning systems

## Source Dataset

This dataset is derived from participants in the **Full-scale Assembly Simulation Testbed (FAST) Dataset**, which contains VR tracking and interaction data from people learning to assemble two full-scale structures.

FAST paper:

> Alec G. Moore, Tiffany D. Do, Nayan N. Chawla, Antonia Jimenez Iriarte, and Ryan P. McMahan. "The Full-scale Assembly Simulation Testbed (FAST) Dataset." 2024. https://arxiv.org/abs/2403.08969

```bibtex
@article{moore2024fast,
  title   = {The Full-scale Assembly Simulation Testbed (FAST) Dataset},
  author  = {Moore, Alec G. and Do, Tiffany D. and Chawla, Nayan N. and
             Iriarte, Antonia Jimenez and McMahan, Ryan P.},
  journal = {arXiv preprint arXiv:2403.08969},
  year    = {2024},
  doi     = {10.48550/arXiv.2403.08969}
}
```

## Citation

If you use this dataset, please cite the associated FutureHCI publication and the FAST paper.

Temporary citation for the accepted paper (to be updated with pages and DOI after publication):

> Xiaozheng Wang and Ryan P. McMahan. 2026. "Generating Synthetic Behavioral Populations from XR Motion." Accepted for publication in the Proceedings of the 2026 Future of HCI Workshop (FutureHCI '26). Forthcoming.

```bibtex
@inproceedings{wang2026synthetic,
  title     = {Generating Synthetic Behavioral Populations from {XR} Motion},
  author    = {Wang, Xiaozheng and McMahan, Ryan P.},
  booktitle = {Proceedings of the 2026 Future of HCI Workshop (FutureHCI '26)},
  year      = {2026},
  note      = {Accepted; forthcoming}
}
```

## License

A separate license has not yet been specified for this synthetic release. Users are responsible for confirming the terms applicable to the source FAST Dataset and this derived dataset before redistribution or commercial use. Repository maintainers should add an explicit license before broad reuse.