One of the most important things I learnt from my PhD research is that surveys are always skewed. Always! Skewing ...
Surveys: Skewing, results, value
Inevitably, the results of any survey are skewed. It is of the nature of surveys. When you survey your students to see if they have understood a lesson, do you realise that your results are probably skewed? Being aware of skewing, how it happens, and what it means is important for the understanding and application of the results.