# Stimuli

**URL:** https://mworks.discourse.group/c/kb/stimuli/10.md

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## [About the Stimuli category](https://mworks.discourse.group/t/about-the-stimuli-category/25)

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**Author:** [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Replies:** 0\
**Last updated:** [July 18, 2022, 3:19pm UTC](https://mworks.discourse.group/t/about-the-stimuli-category/25 "2022-07-18T15:19:26Z")

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Visual stimuli in MWorks.

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## [Creating a stimulus group from a folder of images](https://mworks.discourse.group/t/creating-a-stimulus-group-from-a-folder-of-images/35)

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**Author:** [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Replies:** 0\
**Last updated:** [April 30, 2018, 3:04pm UTC](https://mworks.discourse.group/t/creating-a-stimulus-group-from-a-folder-of-images/35 "2018-04-30T15:04:24Z")

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Many experiments involve displaying a sequence of image stimuli. If the images you want to use are in a folder on disk, you can easily create a group of image stimuli using a replicator. Range replicator Suppose you ha…

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## [Image stimulus memory usage](https://mworks.discourse.group/t/image-stimulus-memory-usage/43)

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**Author:** [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Replies:** 0\
**Last updated:** [April 30, 2018, 3:11pm UTC](https://mworks.discourse.group/t/image-stimulus-memory-usage/43 "2018-04-30T15:11:29Z")

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The memory requirements of an experiment that loads a large number of image stimuli can exceed available main memory (RAM) or video memory (VRAM). When this happens, there are a number of steps you can take to reduce yo…

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## [Using the file hash to verify an image stimulus](https://mworks.discourse.group/t/using-the-file-hash-to-verify-an-image-stimulus/49)

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**Author:** [@cstawarz](https://mworks.discourse.group/u/cstawarz)\
**Replies:** 0\
**Last updated:** [February 13, 2014, 5:06pm UTC](https://mworks.discourse.group/t/using-the-file-hash-to-verify-an-image-stimulus/49 "2014-02-13T17:06:47Z")

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Available in post-0.4.4 releases of MWorks, including nightly builds since January 25, 2011 Whenever MWorks displays an image stimulus, information about the image is logged to the data file in a #stimDisplayUpdate even…