You never call: demoting unused contacts on mobile phones using DMTR

Ofer Bergman, Andreas Komninos, Dimitrios Liarokapis, James Clarke

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Throughout their lives, people gather contacts on their mobile phones. Some of these are unused contacts—contacts that have not been used for a long time and are less likely to be used in future calls. These contacts compete for the users’ attention and the mobile phone’s limited screen capacity. To address this problem, we developed a prototype contact list interface called DMTR, which automatically demotes unused contacts by presenting them in a smaller font at the bottom of the contact list. In phase I of this research, we asked 18 participants to assess for how long they had not used each of their mobile phone contacts.
Original languageEnglish
Pages (from-to)757-766
Number of pages10
JournalPersonal and Ubiquitous Computing
Issue number6
Early online date13 Jun 2011
Publication statusPublished - Aug 2012


  • mobile phones
  • contact list interface
  • DMTR


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