Wemmie's studies have shown that these acid-sensing proteins are required for normal fear responses and for learning and memory in mice. However, while you can buy a kit to measure the acidity of your garden soil, there currently is no easy way to measure pH changes in the brain.
For the normal version of the english typing test we have calculated an average of 41 WPM, this value is based on over 73 million typing results. Considering that these words are relatively easy to type, the avg WPM is probably around 20-25 WPM for normal text with punctutations etc.
WPM: The most commonly used typing speed measurement but there are differences in word length, so a word in the WPM standard is five characters. How many words can a person type per minute on average? It is no sense to use a real word to measure a person's typing speed. The average person types about 40 WPM and half the population lacks the finger dexterity to type faster than 50 WPM.