<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"><base href="x-msg://704/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Negative decay would be.... Incubation? Consolidation? It would mean the activation would increase instead of decrease. <div>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></div><div><br></div><div><br><div><div>On Jan 15, 2013, at 3:05 PM, Cleotilde Gonzalez <<a href="mailto:coty@cmu.edu">coty@cmu.edu</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple" style="font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="WordSection1" style="page: WordSection1; "><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">ACT-R friends,<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "> 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 :-)<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); "> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif; "><span style="font-size: 11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125); ">Coty<o:p></o:p></span></div></div>_______________________________________________<br>ACT-R-users mailing list<br><a href="mailto:ACT-R-users@act-r.psy.cmu.edu" style="color: purple; text-decoration: underline; ">ACT-R-users@act-r.psy.cmu.edu</a><br><a href="http://act-r.psy.cmu.edu/mailman/listinfo/act-r-users" style="color: purple; text-decoration: underline; ">http://act-r.psy.cmu.edu/mailman/listinfo/act-r-users</a><br></div></blockquote></div><br><div apple-content-edited="true">
<div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">=================================================<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></div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Telephone: +31 50 3636435 Office: Bernouilliborg 322<br>=================================================<br></div></div>
</div>
<br></div></body></html>