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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">thanks a lot for the reference!<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Niels Taatgen [mailto:n.a.taatgen@rug.nl]
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<b>Sent:</b> Tuesday, January 15, 2013 9:26 AM<br>
<b>To:</b> Cleotilde Gonzalez<br>
<b>Cc:</b> act-r-users@act-r.psy.cmu.edu<br>
<b>Subject:</b> Re: [ACT-R-users] what does negative decay mean?<o:p></o:p></span></p>
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<p class="MsoNormal">Negative decay would be.... Incubation? Consolidation? It would mean the activation would increase instead of decrease. <o:p></o:p></p>
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<p class="MsoNormal">More realistically, I and others have experimented with values in the 0.2-0.3 range when dealing with models of multiday experiments. Jon Fincham and John Anderson wrote a paper about it: <a href="http://act-r.psy.cmu.edu/publications/pubinfo.php?id=133">http://act-r.psy.cmu.edu/publications/pubinfo.php?id=133</a><o:p></o:p></p>
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<p class="MsoNormal">On Jan 15, 2013, at 3:05 PM, Cleotilde Gonzalez <<a href="mailto:coty@cmu.edu">coty@cmu.edu</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">ACT-R friends,</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> During explorations of the decay parameter in the ACT-R activation equation, we have wondered if any body has ever used a negative value or even zero, or
even something different from the .5 default value. What would a negative value of decay mean? just curiosity, I don't think we are going to go that far :-)</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Coty</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">_______________________________________________<br>
ACT-R-users mailing list<br>
<a href="mailto:ACT-R-users@act-r.psy.cmu.edu"><span style="color:purple">ACT-R-users@act-r.psy.cmu.edu</span></a><br>
<a href="http://act-r.psy.cmu.edu/mailman/listinfo/act-r-users"><span style="color:purple">http://act-r.psy.cmu.edu/mailman/listinfo/act-r-users</span></a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black">=================================================<br>
Niels Taatgen - Professor<br>
University of Groningen, Artificial Intelligence<br>
web: <a href="http://www.ai.rug.nl/~niels">http://www.ai.rug.nl/~niels</a> email: <a href="mailto:n.a.taatgen@rug.nl">n.a.taatgen@rug.nl</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif";color:black">Telephone: +31 50 3636435 Office: Bernouilliborg 322<br>
=================================================<o:p></o:p></span></p>
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