Younghee Jung
ABSTRACT
This paper presents the design, implementation and validation of an enhanced mobile phone messaging system (DeDe), allowing the sender to define the context in which the message will be delivered to the recipient. A field trial among a socially tight group of teenagers showed that the DeDe feature was incorporated as part of the participants' existing messaging culture. 11,4% of their total messaging output made use of the DeDe feature. The most frequently used context parameters were location (based on network cell-ID) and time. Novel message practices emerged, as compared to 'normal' messaging, both in terms of timing of message sending, as well as creating content that specifically exploited the DeDe feature. Some use barriers were recognized, the most important being the sender's uncertainty of delivery success. Implications for design are discussed.
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Index Terms
- DeDe: design and evaluation of a context-enhanced mobile messaging system
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Reviews
D.C. Charles Hair
Jung, Persson, and Blom describe research into the use of an enhanced mobile messaging system called the defined delivery system (DeDe). A mobile messaging system was enhanced to permit message senders to specify the context in which messages are delivered to recipients. This enhancement represents an effort to help establish the contextual appropriateness of topics raised by the messages, for instance, by not delivering messages at inappropriate times. A system that lets senders specify a context was seen as less invasive than using a system that makes contextual information about the recipient available to senders. This approach was also seen as preferable to one that might require all potential recipients to update a database of information about themselves. In the DeDe system, senders could specify one of four context parameters for a given message. The four parameters are: time of message delivery; location, when the recipient's phone is registered to the defined cell of the subscription network; phone call right before the recipient calls or receives a call from a defined number; and Bluetooth device in range. A usage study of DeDe was conducted using a group of seven individuals who comprised an existing socially tight peer group, and who were familiar with mobile phone messaging. The test period was 33 days. Results indicate that the DeDe features were incorporated into normal phone messaging use by the participants. Location and time were the most used parameters. Some new message practices emerged during the test period related to timing and content of messages that used DeDe's features. A problem emerged with regard to sender uncertainty about whether messages were successfully delivered. The research described is interesting, and points to a promising approach for enhancing mobile messaging systems. It should interest others working in this area, as well as those more generally interested in improving automated interfaces. Online Computing Reviews Service
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