Stim Files Jun 2026

Standard practice involves using scripts like make_stim_times.py to convert simple "0/1" onset files into proper timing files that the analysis software can process.

Packages like AFNI (afni_proc.py) or the Brain Imaging Data Structure (BIDS) import these files to correlate blood-oxygen-level-dependent (BOLD) signals with specific real-world tasks.

Did you receive an when attempting to access it?

Ensure that the internal clock of your stimulus-delivery software (like PsychoPy, E-Prime, or Presentation) is perfectly synchronized with the hardware clock of your DAQ (Data Acquisition) system or scanner. stim files

save_stim_file(stim_file, "experiment_protocol.stim")

The faster an engineer can convert a design simulation into a working STIM file for the factory floor, the sooner a product can launch.

What (e.g., bHaptics, TENS/EMS, custom Arduino) are you targeting? Ensure that the internal clock of your stimulus-delivery

Ensure they are properly trimmed to match the fMRI data.

Surprisingly, many obscure file extensions are just plain text files under the hood, formatted in XML, JSON, or basic configuration syntax. How to Open and View a STIM File

Neuroimaging pipelines read them via AFNI or Neuroimaging in Python (NiBabel/Nilearn) . Quantum files are read using the stim library in Python. Example: Parsing a Quantum .stim File in Python Ensure they are properly trimmed to match the fMRI data

This article explores what stim files are, their structure, their role in neuroimaging (fMRI/EEG), and best practices for creating and managing them. 1. What Are Stim Files?

| Advantage | Explanation | |-----------|-------------| | | Plain text (CSV/TSV) can be viewed/edited in any text editor or spreadsheet. | | Version control friendly | Text format works seamlessly with Git, SVN, etc. | | Reusable | One stim file can drive many participants; changes require no recompilation. | | Parametric design | Easily generate factorial designs using scripts (Python, R, MATLAB). | | Analysis pipeline integration | The same file used for presentation can be loaded directly into R/Python for regression or ANOVA. | | Tool‑agnostic | Compatible with Psychtoolbox (MATLAB), PsychoPy (Python), E‑Prime, OpenSesame, and custom engines. |