This archive contains data and models reported in the following publication:

Petrov, A.  (2010). Category rating is based on prototypes and not instances: 
  Evidence from feedback-dependent context effects. 
  Journal of Experimental Psychology: Human Perception and Performance, ?, ??-??.   
PDF preprint is included here and also available on-line at http://alexpetrov.com/pub/jephpp10/

The three subfolders contain the following:
* fdbk1 -- Experiment 1 -- This is the most informative folder. Also contains model fits.
* CRFeedback2 -- Experiment 2
* protoanchor -- Matlab implementation of the INST model

Each of these subfolders has its own readme.txt file with further details.

Note: The Matlab scripts depend on various utilities and on the whole infrastructure available
on Alex Petrov's office computer.  No effort has been made here to track all dependencies and
include them in this distribution. Thus, they will *not* work by themselves. An (old) version 
of the most important utilities is available on-line at http://alexpetrov.com/softw/   
The version of the ANCHOR model for the Psych Review paper (Petrov & Anderson, 2005) is available
at http://alexpetrov.com/proj/anchor/
If you download and install utils and anchor, together with the scripts provided in this archive,
you do have a fighting chance of getting everything to work.  However, this is hardly the point.
The point is to get a feeling of what was done in the JEP:HPP paper and make the experimental 
data available for your own explorations.  Let me know if I can be of further help.

Good luck!

-- Alex Petrov  2010-07-26


DISCLAIMER ***************************************************************************
The MATLAB scripts are made available in the hope that they may be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License and
the Free Software Foundation website (http://www.fsf.org) for more details.

GNU PL  ******************************************************************************
The software is freely available and freely redistributable, according
to the conditions of the GNU General Public License. You may not
distribute the software, in whole or in part, in conjunction with
proprietary code. That means you ONLY have my permission to distribute a
program that uses my code IF you also make freely available (under the
terms of the GNU GPL) the source code for your whole project. You may
not pass on the software to another party in its current form or any
altered, embellished or reduced form, without acknowledging the author,
citing the Petrov & Anderson (2005) Psych Review paper and the Petrov (2010)
JEP:HPP paper, and including a pointer to the GNU GPL.

Please notify the author of any bugs, notes, comments or suggested
changes, particularly of any useful changes you may have made to 
your own copy of the software.

Thank you for your interest in ANCHOR. Happy modeling!

Alex Petrov, 2010-07-26

-------------------------------------------------------------
Alexander A. Petrov:  apetrov [at] alexpetrov [dot] com

Assistant Professor, Department of Psychology
Ohio State University, Columbus, OH 43210
http://alexpetrov.com

It is better to light one candle than to curse the darkness.
-------------------------------------------------------------
