# Probability Decision-making Task with ambiguity (on004917)

## How to use the data (for agentic research)

### What it is

- **Modalities:** ANAT, DWI, EEG, FMAP, FUNC
- **Participants:** 53
- **Size:** 37.5 GB
- **Tasks:** pdm

### License and terms

- **License:** [CC0](https://creativecommons.org/publicdomain/zero/1.0/)
- **Recommended citation:** Figueroa-Vargas, A., Valdebenito-Oyarzo, G., Martínez-Molina, M. P., Zamorano, F., & Billeke, P. (2026). Probability Decision-making Task with ambiguity (Version v1.0.0) \[Data set\]. NEMAR. https://doi.org/10.82901/nemar.on004917

### Where the bytes are

- **Latest version (always current):** [https://data.nemar.org/on004917/latest/](https://data.nemar.org/on004917/latest/)
- **This version (v1.0.0):** [https://data.nemar.org/on004917/v1.0.0/](https://data.nemar.org/on004917/v1.0.0/)

### How to download

- **The dataset:** `nemar dataset download on004917`. Clones and fetches in one step. Content under stimuli/ and derivatives/ is skipped by default because those trees can be large; add --stimuli --derivatives for the whole thing.
- **A subset, one step:** `nemar dataset download on004917 --subjects sub-01,02`. Also filters by --sessions, --tasks, --runs, --datatypes, --include and --exclude.
- **A subset, step 1:** `nemar dataset clone on004917`. Clones git-annex pointers only; fetches no file content. Creates ./on004917.
- **A subset, step 2:** `cd on004917`. The get command below reads the clone's annex, so it only works from inside the clone.
- **A subset, step 3:** `nemar dataset get <files>`. Pulls the files you actually need. Skips stimuli/ and derivatives/ unless the path you ask for is under one of them.
- **One small file:** [https://data.nemar.org/on004917/v1.0.0/participants.tsv](https://data.nemar.org/on004917/v1.0.0/participants.tsv). A direct HTTPS fetch works for any single file.

### Assess fit without downloading

- **Participants table:** [https://data.nemar.org/on004917/v1.0.0/participants.tsv](https://data.nemar.org/on004917/v1.0.0/participants.tsv)
- **Dataset description:** [https://data.nemar.org/on004917/v1.0.0/dataset_description.json](https://data.nemar.org/on004917/v1.0.0/dataset_description.json)
- **Directory listing:** [https://data.nemar.org/on004917/v1.0.0/?format=json](https://data.nemar.org/on004917/v1.0.0/?format=json)
- **Catalog record:** [https://api.nemar.org/datasets/on004917](https://api.nemar.org/datasets/on004917)