VBLDCogSci.R Contains source code written in R used for analyzing the 
             eyetracking experimental data presented
polaritydata.Rda This is an R data file containing the eyetracking data 
                 for position 9 in the six conditions (the polarity item)
alldatapos9.Rda This is an R data file that contains the mean scores for 
                dependent measures; this is intended for plotting purposes
ACTRModelNPI is the ACT-R Model for the polarity design. A README file is provided.
ACT-R-environmentEnhanced.tar.gz This is a modified version of ACT-R 5 
                      (some changes were made in the original production rule 
                      syntax)