Betrayal: Ultimatum Game and Trust Game Data and Analyses

This repository contains analysis code and derivative outputs related to our manuscript,
“Linking dACC Responses to Unreciprocated Trust to Brain and Behavior in the Ultimatum Game.”

All hypotheses and analysis plans were pre-registered on the
Open Science Framework.

The goal of this repository is to support transparency and reproducibility of the reported analyses. With appropriate access to the underlying data, an external user should be able to reproduce the primary results described in the manuscript.

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Prerequisites and computing environment

Users of this repository are expected to be comfortable working in a Linux environment and navigating the command line.

Required software includes:

• FSL (for fMRI preprocessing and statistical analyses)
• Bash (for scripting and pipeline execution)
• Linux operating system (local workstation or HPC environment)

Additional dependencies and environment details are documented within individual scripts as needed.

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Notes on repository organization

This repository does not currently contain a full BIDS dataset. Instead, it includes analysis scripts and selected derivative outputs. Large files and raw imaging data are not tracked in git.

Tracked directories include:

• code/
  Scripts used to run behavioral and fMRI analyses, including first-, second-, and third-level models.

• derivatives/
  Outputs from Level 1, Level 2, and Level 3 fMRI analyses. Only selected derivative files are tracked; larger outputs can be regenerated by re-running the analysis scripts.

• masks/
  ROI mask files (.nii.gz) used in region-of-interest analyses.

• templates/
  FSL .fsf template files used to define analysis models.

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Running the analyses

Analyses for this project are executed via a sequence of bash scripts corresponding to first-, second-, and third-level fMRI analyses.

From the code repository, run the following commands in order:

bash run_L1stats-ugr.sh
bash run_L2stats-ugr.sh
bash run_L3stats-ugr.sh



## Reproducibility notes

This repository is intended to allow reproduction of reported analyses given access to the
appropriate input data. Some components (e.g., raw imaging data or large intermediate files)
are not included here and may be hosted separately or managed outside of version control.

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## Contact

Questions about this repository or the associated analyses can be directed to the authors
of the manuscript.