[alpaca128]

I'm curious about the WPM test methodology; for example if all those studies use a standardised method or not. Because at least the various WPM testing tools and websites are extremely inconsistent in different aspects.

My own typing speed ranges from ~40WPM to ~110WPM depending on what tool or test method I'm using. For example some tests just use any random word from the dictionary, which of course includes very long and complicated ones, others go as far as to limit themselves to the 100 most common English words. And even with those factors being identical I can still get different speeds depending on the UI; the cursor movement, presentation of the text and input latency all have a measurable impact on the end result.