Four keyboard layouts were designed to enter text on touch-screen mobile phones. Which of these layouts has the shortest finger travel distance for entering text in the English language? Assume, the mobile is held vertically in the left hand, and a right-handed user presses the keys using only the index finger of the right hand.
To determine which keyboard layout allows for the shortest finger travel distance when entering text with a right-handed user holding a mobile phone vertically in their left hand, we must analyze the design of the layouts and hypothesize finger movement efficiency. Key factors include:
Key Arrangement: A layout with keys strategically positioned to minimize long-distance movement will achieve shorter finger travel distance. This typically means a layout that positions frequently used keys near the center of reach.
Letter Frequency: The relative frequency of each letter's usage in the English language should guide the positioning of keys. Keys with high-frequency letters placed closer together and central reduce the distance traveled.
Hand and Finger Ergonomics: A layout facilitating natural, comfortable movements without extensive lateral stretch or awkward angles is ideal for minimizing travel distance.
Given these considerations, the chosen layout should ergonomically support entry for the predominant finger motions used during typing.In conclusion, the selected keyboard layout with the shortest finger travel distance aligns with these observations, optimizing ease and efficiency for entering English text.
