Yijue How and Min-Yen Kan
Optimizing SMS Entry (HCII 2005)
10/16
Methodology and Baseline
•For each of the 10K messages:
–Calculate KLM and OLM timing for message entry
•Average over total for both novices and experts
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•Baseline: Tegic T1 (based on 2004 Nokia phone)
•Need to know order of alternative words
–E.g., 6334 = “good” next “home”
–Reverse-engineered dictionary
•Results:
–74 keystrokes (average KLM)
–74 seconds (average OLM)
•59.7 and 149.56 for expert / novice OLM