These two approaches do their best to define a set of measurable criteria that seem to drive engagement. But I expect the authors would agree that there are other variables missing from the equation, specifically content and question wording. It is sort of the nature of the MR beast that we do lots of surveys on pretty boring topics. And the art of question writing and questionnaire design is practiced somewhat unevenly, to say the least. These things are very difficult to measure. I might agree with John Bremer if his point is that clear and easily understood questions on a salient topic can keep people engaged for more than 20 minutes. But based on my experience, that's a high bar given current practice in the industry. A long-winded way of saying that a simple rule like 20 minutes may be the best course. To this I would add that research like this moves the ball forward in an important way by getting us beyond talk of slider bars, engaging colors and cute answering gadgets. Surveys are too long and boring. Now that we have more or less agreed about the long part, let's focus on boring.

Президент посмотрел на часы на стене Девять часов

- Они просто играли роль приманки, отвлекающей внимание от группы, получившей задание разрушить центр управления Каматори с трудом поверил, что ему так сказочно повезло