# Grupos Pre and Post bids (on007667)

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

### What it is

- **Modalities:** EEG
- **Participants:** 55
- **Size:** 626 MB
- **Tasks:** 001, 002, 003, 004, 005, 006, 007, 008, 009, 010, 011, 020, 022, Grupo1Postbids, Grupo2Prebids, Grupo3Postbids, Grupo3Prebids, NMpost, group2postbids, nm

### License and terms

- **License:** [CC0](https://creativecommons.org/publicdomain/zero/1.0/)
- **Recommended citation:** MENGSHA, Q. I. (2026). Grupos Pre and Post bids (Version v1.0.0) \[Data set\]. NEMAR. https://doi.org/10.82901/nemar.on007667

### Where the bytes are

- **Latest version (always current):** [https://data.nemar.org/on007667/latest/](https://data.nemar.org/on007667/latest/)
- **This version (v1.0.0):** [https://data.nemar.org/on007667/v1.0.0/](https://data.nemar.org/on007667/v1.0.0/)

### How to download

- **The dataset:** `nemar dataset download on007667`. 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 on007667 --subjects sub-01,02`. Also filters by --sessions, --tasks, --runs, --datatypes, --include and --exclude.
- **A subset, step 1:** `nemar dataset clone on007667`. Clones git-annex pointers only; fetches no file content. Creates ./on007667.
- **A subset, step 2:** `cd on007667`. 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/on007667/v1.0.0/participants.tsv](https://data.nemar.org/on007667/v1.0.0/participants.tsv). A direct HTTPS fetch works for any single file.

### Assess fit without downloading

- **Participants table:** [https://data.nemar.org/on007667/v1.0.0/participants.tsv](https://data.nemar.org/on007667/v1.0.0/participants.tsv)
- **Dataset description:** [https://data.nemar.org/on007667/v1.0.0/dataset_description.json](https://data.nemar.org/on007667/v1.0.0/dataset_description.json)
- **Directory listing:** [https://data.nemar.org/on007667/v1.0.0/?format=json](https://data.nemar.org/on007667/v1.0.0/?format=json)
- **Catalog record:** [https://api.nemar.org/datasets/on007667](https://api.nemar.org/datasets/on007667)