Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Keystroke Saving(also: KS, Keystroke Reduction)
- A metric used to evaluate word prediction and word completion systems, measuring the percentage of keystrokes that a user can avoid by accepting system predictions instead of typing each character individually. Keystroke saving is calculated by comparing the number of keystrokes…
- Keystroke Saving Rate(also: KSR, Keystroke Savings)
- A metric measuring the efficiency of text prediction systems by calculating the percentage of keystrokes saved compared to typing the same text on a standard keyboard without prediction. A KSR of 50% means the user needed only half the keystrokes they would have required…
- Keystroke Savings(also: KS, Key Savings)
- A metric used to evaluate word prediction systems, measuring the percentage of keystrokes eliminated by accepting predictions compared to typing the full text character by character. While keystroke savings is commonly reported in AAC research, it does not directly translate to…
- Keystrokes Per Character(also: KSPC)
- A metric used to evaluate the efficiency of text-entry methods by measuring the average number of keystrokes required to produce each character of text. A lower KSPC indicates a more efficient input method. For standard MultiTap on a 12-key phone keypad, the theoretical best…
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