The ACT-R versions are described and linked to in (G5). The Common Lisp implementations that we know that work are listed below, roughly in order of ease of use, not price. Approximate price is in parentheses for single user license. Clisp: It is running on Windows and other Unix systems, such as Linux, FreeBSD, NetBSD, and Solaris, etc. (free) There is a version of ACT-R in Java being created by Tony Harrison. You can get more information from the jACT-R website.

The Soar software page is your first port of call. Older versions of Soar are available here: sitemaker.umich.edu/soar/soar_archive. There are a number of versions of Soar available for different combinations of machines and operating systems. Soar Version 8.6.1 and 8.6.2 Releases: Soar Suite 8.6.1 and 8.6.2 are now avaiable for download. Doug Pearson and other colleagues added a help menu to the debugger in the 8.6.2 version and it includes a link to this Soar FAQ. Soar Version 8.6.

The American College Test or ACT is another entrance examination that schools will accept in lieu of or in addition to the SAT. The test is divided into four sections: English, math, social science, and natural science. Responding to the changes in the SAT I, the ACT will also offer a new writing component. The test is scored on a 1-36 scale, with 36 being the best. It is given in September, October, December, February, April and June of the academic year and does not conflict with the SAT.

Here are some introductory materials to get you started. A more complete list is available at the ACT-R website, at act-r.psy.cmu.edu/publications. Anderson, J. R. & Matessa, M. (1998). The rational analysis of categorization and the ACT-R architecture. In M. Oaksford & N. Chater (Eds.) Rational models of cognition, pp. 197-217. Oxford: Oxford University Press. Anderson, J. R., Bothell, D., Byrne, M. D., Douglass, S., Lebiere, C., & Qin, Y. (2004). An integrated theory of mind.

Most new users are starting in the latest version, ACT-R 6. Some users still use ACT-R 5 or 4. Only one user we know of, working with legacy code, is still using ACT-R 3 (he is lonely). Older versions may be available from the Dan Bothel or Frank Ritter. ACT-R 6 was released in 2005 and last updated in July 2006. This is available at http://act-r.psy.cmu.edu/actr6/. There is a much newer version of the environment that works in a wide variety of Lisps. Please see http://act-r.psy.cmu.

ACT-R is used primarily to model experimental psychology data. For example, researchers at CMU, George Mason, and RPI work on this topic. ACT-R has also been used to model behavior in synthetic environments. Researchers at CMU have worked on this. You can also browse the ACT-R workshop talks and proceedings to get an idea of who was working on what, as well as the published and contributed models on the main web site. There are further examples in the FAQ as well.

Probably the best way to learn ACT-R is to visit a lab where people are actively using ACT-R, and stay for as long as you can manage (months rather than days). To help people, however, there is an online tutorial for ACT-R. In addition, there is also annual ACT-R Summer School at CMU.

A PC running Microsoft Windows XP/2000/NT4.0, Internet Explorer 5.5 or higher as well as an Internet connection. Finally, you will need at least 5MB free disk space.

Yes, definitely. Inferior R mode provides a readline/history mechanism, object name completion, and syntax-based highlighting of the interaction buffer using Font Lock mode, as well as a very convenient interface to the R help system. Of course, it also integrates nicely with the mechanisms for editing R source using Emacs. One can write code in one Emacs buffer and send whole or parts of it for execution to R; this is helpful for both data analysis and programming.

ACT-R's official name is an acronym for "Adaptive Control of Thought - Rational" (Anderson et al., 2004), which is based upon the ACT Theory (Anderson, 1976). We have also seen it as other acronyms based on the 1998 book's title, the Atomic Components of Thought, and based on the 1990 book's title, the Adaptive Character of Thought. Anderson, J. R., Bothell, D., Byrne, M. D., Douglass, S., Lebiere, C., & Qin, Y. (2004). An integrated theory of mind. Psychological Review, 111(4), 1036-1060.

ACT-R is useful for modeling human cognition. It is particularly strong in modeling traditional, so-called, experimental psychology data, modeling cognitive psychology data, and as serving as a way to cumulate the results in these areas. If you are interested in understanding and predicting data in these areas, it should be considered a possible tool for you.

Anderson, J. R., Bothell, D., Byrne, M. D., Douglass, S., Lebiere, C., & Qin, Y. (2004). An integrated theory of mind. Psychological Review, 111(4), 1036-1060. Anderson, J. R., & Lebiere, C. (1998). The Atomic Components of Thought. Mahwah, NJ: Lawrence Erlbaum Associates. Anderson, J. R. (2007). How can the human mind occur in the physical universe? New York: Oxford University Press.

Helpful, general, information on composing a bug report can be found here. Basically, as you may already know, the clearer and more concise and more repeatable your bug is, the more help can be given.

The ACT-R community meets annually at the ACT-R Workshop. This year's (2006) workshop was held at Carnegie Mellon University from July 21 to 23. Various other meetings occur throughout the year. One example is the Winter Workshop on ACT-R models of Human-System Interaction. The community is also often seen at the Cognitive Science Conference and at the International Conference on Cognitive Modeling.

Anderson, J. R., Schunn, C. D. (2000). Implications of the ACT-R learning theory: No magic bullets. In R. Glaser (Ed.), Advances in instructional psychology: Educational design and cognitive science, 5 (1-33). Mahwah, NJ: Erlbaum. Anderson, J. R., Corbett, A. T., Koedinger, K. R., & Pelletier, R. (1995). Cognitive tutors: Lessons learned. The Journal of the Learning Sciences, 4 (2), 167-207. Koedinger, K. R., Anderson, J. R., Hadley, W. H., & Mark, M. A. (1997).

Back in the 1960/70s, scientists were suspicious of the Ministry of Agriculture and Fisheries (MAF) because of the many failing fisheries at the time. What they wanted was the security of law for a protected area for scientific research. Thus the Marine Reserves Act 1971 was born. What they did not sufficiently consider, was its unnecessary complexity, due to duplication and linkage with other acts, and enforcement.

We do not require the SAT / ACT for admission. However, we do recommend that you still take them. If you have taken the test, feel free to forward your scores to the Office of Admissions for review.

R is being developed for the Unix, Windows and Mac families of operating systems. Support for Mac OS Classic ended with R 1.7.1. The current version of R will configure and build under a number of common Unix platforms including cpu-linux-gnu for the i386, alpha, arm, hppa, ia64, m68k, mips/mipsel, powerpc, s390, sparc (e.g., http://buildd.debian.org/build.php?&pkg=r-base), and x86_64 CPUs, powerpc-apple-darwin, mips-sgi-irix, rs6000-ibm-aix, and sparc-sun-solaris.