On smartphones survey results are announced that voice input is about 3 times faster than keyboard input

The smartphone adopts the character input method of tapping the keyboard displayed on the screen to enter characters by keyboard input and voice input for inputting characters using voice. About the character input of the smartphone, the research team of Stanford University investigated which of the voice input and the keyboard input is fast, and the result is disclosed.

Speech Is 3x Faster than Typing for English and Mandarin Text Entry on Mobile Devices
http://arxiv.org/abs/1608.07323

Speech Is 3x Faster than Typing for English and Mandarin Text Entry on Mobile Devices
http://hci.stanford.edu/research/speech/

The details of the survey on the character input speed of Stanford University can be confirmed from the following movie.

Stanford experiment shows speech recognition writes texts more quickly than thumbs - YouTube


It was Professor James Randy of the Faculty of Computer Science at Stanford University who led the survey. The team developed an application that records action data when the user inputs characters, issued a time stamp for each input, and investigated the input speed and error rate.


Survey targets were English and Chinese (Mandarin), Baidu's Deep Speech 2 for voice input and Apple's iOS genuine keyboard for keyboard input.


Input was used for simple sentences such as "buckle up for safety" (wearing a seatbelt for safety), and he analyzed more than 3,200 sample data through surveys.


The box plot (box plot) below shows the number of word inputs per minute, from the left "English keyboard input" "English voice input" "English initial voice input" (English initial voice input Input) "" Chinese keyboard input "" Chinese voice input "" Chinese initial voice input "has become. From the survey it turned out that English speech input was about 3 times faster than English keyboard input and Chinese speech input was about 2.8 times faster than keyboard input. Even if you look at the graph, the difference is obvious.


It is inconvenient as an input system if there is no accuracy even though the input speed of voice input is fast. In this respect, the following graph showing the probability of occurrence of the following error shows that there is little difference between voice and keyboard input in English, but in Chinese it has a large difference in error rate between voice and keyboard input I understand. According to the survey, it is known that the English error rate is 20% lower for voice input and about 60% lower for Chinese.


Professor Randy said, "We knew to some extent that speech input is faster, but it is an amazing result that three times as much difference was made."