[ACT-R-users] what does negative decay mean?

[Varun Dutt]

Hi Coty,

In ACT-R, a negative decay would imply a perfect memory (i.e., where the activation of instances increase over time). In my knowledge, there is only one paper that has found empirical (experimental) evidence of a negative decay value:
http://act-r.psy.cmu.edu/papers/667/p1133.pdf 

These authors tested it for an experiment involving arousal and recall. They found that a negative decay is better suited to  model highly aroused individuals compared to low aroused individuals.

Best,Varun--Varun Dutt, M.S., Ph.D.Co-advisor, International RelationsFaculty Advisor,Undergraduate studentsAssistant ProfessorSchool of Computing and Electrical EngineeringSchool of Humanities and Social SciencesIndian Institute of Technology Mandi, India
--- On Tue, 15/1/13, Cleotilde Gonzalez <coty at cmu.edu> wrote:

From: Cleotilde Gonzalez <coty at cmu.edu>
Subject: [ACT-R-users] what does negative decay mean?
To: "act-r-users at act-r.psy.cmu.edu" <act-r-users at act-r.psy.cmu.edu>
Date: Tuesday, 15 January, 2013, 19:35



 
 




ACT-R friends, 
   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 :-) 
   
Coty
 




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