LetterScroll makes extensive use of speech feedback.
Upon completing a word, the user clicks the secondary mouse button to insert a The cursor persists at the last position with subsequent To select a character, users "click" the primary mouse button. Since vowels are easily recognized and recalled, they are given special treatment to decrease the cognitive load on the A model for conceptualizing the character set Jumping to vowels using additional keys on the device (such as a mobile keypad or a keyboard).įigure 1. LetterScroll uses a mouse scroll wheel to move the cursor through the character set (Figure 1). The set can be expanded to include numbers, diacritics, and special symbols such as punctuation. Our character set uses the 26 letters in the EnglishĪlphabet. The underlying concept is the date stamp method where increment and decrement operations maneuver a cursor LetterScroll is a text entry technique that extends an earlier three-key technique to include visually impaired users. (SMS) difficult for visually impaired users. Smallĭevices such as mobile phones rarely include Text-To-Speech and this makes the simple task of sending a text message A key question is, are these electronic devices usable by visually impaired users and, if so, to whatĮxtent? In general, text entry is highly reliant on vision, leaving visually impaired users at a disadvantage. Increasingly, text-based tasks are shifting from physical channels, such as paper, to electronic channels, such as mobile Information Interfaces and Presentation, User Interfaces: Input Devices and Strategies Visually impaired, text entry, auditory feedback, voice synthesis, mouse wheel In a study with sevenīlindfolded participants, entry rates averaged 2.9 wpm for M1 and 4.4 wpm for M4. Method 4 (M4) also uses the keyboard to access vowels. After extensive analyses and pilot testing, two variations were chosen for initial evaluation. Keystrokes per character ( KSPC) vary fromĦ.97 to 2.68. LetterScroll uses a mouse wheel to maneuver aĬursor across a sequence of characters, and a button for character selection. Toronto, Ontario, Canada M3J text entry techniques for visually impaired users are presented. Extended Abstracts of the ACM Conference on Human Factors in Computing Systems – CHI 2008, pp. LetterScroll: Text entry using a wheel for visually impaired users. Try it out and see how wheel acceleration will make your work much more efficient and enjoyable.Tinwala, H., and MacKenzie, I. This indispensable feature makes mouse wheel scrolling more accurate when you turn the wheel slowly, and it scrolls your documents much faster when you turn the wheel quickly. ScrollNavigator also adds dynamic acceleration to your mouse wheel.
Scroll reverser m1 windows#
all office programs, explorer windows and most other applications). ScrollNavigator works with all windows that have standard scroll bars (e.g. This saves you the trouble of positioning the mouse cursor over a scroll bar and it allows scrolling both directions at the same time. Simply click and hold down the right mouse button anywhere in a window and move the mouse to scroll the window contents. ScrollNavigator helps you to scroll your documents horizontally and vertically.
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