jACT-R Holiday Wishes

Thanksgiving isn't even here yet, much less the big winter holidays, but I've decided it's time for a present! The latest release brings some of the last few major fixes and features required for complete compatibility. Yes, 6.0 style associative links are finally here. The only things remaining are production compilation and a few small features on the PM side.


jACT-R & Eclipse : Revisions & Collaboration

One of the benefits of using the Eclipse platform for developing ACT-R models is that it supports a variety of tools for revision control and collaboration. Whether it is tracking down and reverting an errant change, sharing complete models, or collaboratively building them, Eclipse makes it quite simple. Here are a few pointers/best practices that you may want to consider.

Revision Control

Bug fix

Another day, another release. There were two big bugs recently uncovered dealing with capacity buffers and visual searches. Both have been resolved.

Capacity buffers have the ability to influence the priorities of instantiation selection. A buffer with more than one chunk can result in a single production having more than one instantiation. Unfortunately, since they will have the same utility, it's a crap shoot as to which should be chosen. This should be influenced by the ordering of the capacity buffer's ejection policy, but the procedural module was ignoring that. Fixed.

November Release

There is a new release available. There are no significant changes to the core, but IO and IDE have seen some additions. Try as I might to ignore my boss's constant pleas, the simple fact is, he signs the paychecks. So, here it is: Lisp (-ish) support!

You can now run lisp based models. However, there are a few caveats:

Developing for jACT-R: Scripted Conditions and Actions

Developing for jACT-R: Scripted Conditions and Actions

Developing for jACT-R: Instrumentation

Developing for jACT-R: Instrumentation

One of the key benefits of modeling is that it allows us to instrument and inspect internal states that are not otherwise accessible in the real world. While most psychological measures are behavioral, sometimes we want to record data from deeper within the model. The IInstrument interface allows us to do just that.


Developing for jACT-R: Custom Conditions and Actions

Developing for jACT-R: Custom Conditions and Actions

October release

The latest release brings a few new features online to make customization of behavior easier. It also includes some IDE fixes, tweaks, and support for a future feature that most will find useful.



Within jACT-R there is are clear functional distinction between various elements. At the highest level is the model itself. Contained within the model can be both modules and extensions. Modules contribute functionality to the model in a theoretically justified manner such as the visual, motor, or declarative modules. Extensions are atheoretic contributions that are often used for integration or computational purposes. Both modules and extensions are embedded within the model file and can contribute their own model elements (e.g.

New release

There's a new release that is mostly just an IDE fix. Apparently for some time now the new project wizard has been borked and not creating the dependent directories correctly. That is fixed now. No more projects with build errors right after the wizard completes.


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