[ACT-R-users] Updated ACT-R software available

[Dan Bothell]

A new version of the ACT-R software is now available on the prerelease
page of the ACT-R web site:

<http://act-r.psy.cmu.edu/next/>

It will be moved to the current version next week.
Here are the notable changes and additions:

- Visual-location and aural-location features have a new attended
status called requested which is true between the request to attend
the feature and when that attention shift competes.
- The audio module has a way to present a sound without a
pre-specified end time using new-ongoing-sound and end-ongoing-sound.
- The speech module has the option of using syllable counts for words
from a dictionary instead of just using the string length.  It is
added as an extra (syllable-count) to avoid the overhead when not
needed.
- The tutorial units have an additional document that is a cumulative
summary of the production syntax and action semantics covered to that
point.
- There are Jupyter notebook pages for editing and running the demos
and assignments of the tutorial in JupyterLab.  They are not a
replacement for the tutorial unit texts, just a way to view and run
the code.  The standalone distributions have a run_ACT-R.ipynb file at
the top level as a starting point with a cell to run the ACT-R
software and links to the individual unit notebooks.  This is a very
simple first pass/proof of concept, and if you use it please let me
know any feedback you have.

If you have any questions or problems with this version let me know.

Dan
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