If you're asking for features of stim files in that context, here are the key ones:
1. Stimulus Definition
Specify type: image, sound, video, text, or simple shapes (e.g., Gabor patches, gratings). Include file paths to external media ( .bmp , .wav , .mp4 , .jpg , .png ).
2. Timing Control
Onset and offset times relative to trial start. Duration of stimulus presentation (e.g., 500 ms). Inter-stimulus interval (ISI) or response window timing.
3. Response & Event Marking
Define correct response (left/right key, button, etc.). Mark stimulus onset/offset in EEG/fMRI data via port codes or event markers for synchronization with recording hardware. stim files
4. Parameter Variation
Set parameters for experimental conditions: contrast, orientation, color, pitch, luminance, size, position. Support for factorial design (e.g., 2x2 combination of face type × emotion).
5. Randomization & Repetition
Random or sequential order of stimuli across trials. Repeat counts and interleaving rules (e.g., no more than 3 same stimuli in a row).
6. Integration with Task Logic