Yijue How and Min-Yen Kan
Optimizing SMS Entry (HCII 2005)
3/16
Problem Statement
•Write English messages using only 12 keys
–1-to-1 mapping of letters to keys not possible
•Need more than one keystroke to type a letter
•We review current approaches and propose improvements using corpus-based
methods
– Key remapping
– Word prediction
•Key point: how to measure performance?
–Keystroke Level Model
–(Better) Operation Level Model
–On actual SMS text
